Statistics

Total Volume of Data

The database contains 65,179,954 publicly accessible machine-generated annotations covering 383,147 images.

Annotations date from 2018-02-08 to 2025-06-14.

Each annotation indicates an area of interest in an image. An area can be a small portion of an image or it can be the entire image. Small regions typically contain a human face or words. Annotations on the full image are typically tags (e.g. cat, watermelon, rock) and descriptions (e.g. a cow standing in a field).

Access to annotations as data is available via the annotation endpoint on the Harvard Art Museums API.

Sources

Annotations are generated from 5 computer vision services and 6 large language models.

Each service supplies a variety of functions for detecting and categorizing features. These are the services and features we use.

Amazon Nova (via AWS Bedrock)
Description generation via prompting
Anthropic Claude (via AWS Bedrock)
Description generation via prompting
AWS Rekognition
Labels, face detection, text detection
Clarifai
Concepts, captions
Google Gemini
Description generation via prompting
Google Vision
Labels, face detection, text detection, landmark detection
Imagga
Faces, tags, categories
Meta Llama (via AWS Bedrock)
Description generation via prompting
Microsoft Cognitive Sources
Tags, categories, descriptions, face detection
Mistral Pixtral (via AWS Bedrock)
Description generation via prompting
OpenAI GPT (via Azure)
Description generation via prompting

Image coverage by source.

Annotation counts by source.

The raw data.

AWS Rekognition Amazon Anthropic Azure OpenAI Service Clarifai Google Gemini Google Vision Imagga Meta Microsoft Cognitive Services Mistral
category 0 0 0 0 0 0 0 1,064,497 0 8,746 0
description 0 715,574 456,928 533,428 369,830 737,290 0 0 677,105 918,932 354,070
face 439,002 0 0 0 0 0 178,435 55,476 0 91,310 0
tag 4,697,663 0 0 0 7,287,234 0 5,025,460 30,227,849 0 2,709,678 0
text 3,779,271 0 0 0 0 0 4,851,795 0 0 0 0
Total 8,915,936 715,574 456,928 533,428 7,657,064 737,290 10,055,690 31,347,822 677,105 3,728,666 354,070

Annotation Types

Annotation types generally describe what the annotation contains or depicts. These are the possible types.

category
a broad categorization of the contents of the image
description
a full sentence caption of the contents of the image
face
a human face is found within the annotation
tag
a term or set of terms describing all or part of the image
text
some text is found within the annotation

Distribution of sources across annotation types.

The raw data.

category description face tag text
AWS Rekognition 0 0 439,002 4,697,663 3,779,271
Amazon 0 715,574 0 0 0
Anthropic 0 456,928 0 0 0
Azure OpenAI Service 0 533,428 0 0 0
Clarifai 0 369,830 0 7,287,234 0
Google Gemini 0 737,290 0 0 0
Google Vision 0 0 178,435 5,025,460 4,851,795
Imagga 1,064,497 0 55,476 30,227,849 0
Meta 0 677,105 0 0 0
Microsoft Cognitive Services 8,746 918,932 91,310 2,709,678 0
Mistral 0 354,070 0 0 0
Total 1,073,243 4,763,157 764,223 49,948,264 8,631,067

Vocabularies1

The tags and descriptions cluster and breakdown in to distinct terms, descriptive phrases, concepts, and named entities.

Terms

The vocabulary of tags contains 15,500 distinct terms.

The size of vocabulary by source.

The raw data.

# of terms
AWS Rekognition 2,743
Clarifai 4,574
Imagga 9,735
Google Vision 8,444
Microsoft Cognitive Services 3,682

Sample set of terms:

Descriptive Phrases

The vocabulary of descriptions contains 52,072 descriptive phrases.

Sample set of descriptive phrases:

Named Entities2

Descriptions can be parsed further in to clusters of named entities.

The vocabulary of named entities contains 2,415 people.

Sample set of people:

Benjamin Grierson (3)

The entity Benjamin Grierson is present in 3 descriptions.

  • a black and white photo of Benjamin Grierson
  • an old photo of Benjamin Grierson
  • black and white photo of Benjamin Grierson
Captain (9)

The entity Captain is present in 9 descriptions.

  • a vintage photo of Captain Moonlite in a suit
  • a vintage photo of Captain Moonlite in a suit and tie
  • a vintage photo of Captain Moonlite wearing a suit and tie
  • a vintage photo of Captain Thunderbolt holding a book
  • a vintage photo of Captain Thunderbolt in a suit and tie
  • a vintage photo of Captain Thunderbolt in a suit and tie holding a book
  • Captain Thunderbolt holding a book
  • Captain Thunderbolt holding a book posing for the camera
  • Captain Thunderbolt holding a sign posing for the camera
Clarence King (3)

The entity Clarence King is present in 3 descriptions.

  • a vintage photo of Clarence King holding a book
  • a vintage photo of Clarence King in a suit and tie
  • a vintage photo of Clarence King wearing a suit and tie
Dame de Paris (6)

The entity Dame de Paris is present in 6 descriptions.

  • a close up of a church with Notre Dame de Paris in the background
  • a close up of an old building with Notre Dame de Paris in the background
  • a close up of an old church with Notre Dame de Paris in the background
  • an old photo of a large building with Notre Dame de Paris in the background
  • an old photo of Notre Dame de Paris
  • old photo of Notre Dame de Paris
Danny Hoffman (6)

The entity Danny Hoffman is present in 6 descriptions.

  • a vintage photo of Danny Hoffman and woman sitting on a bench
  • a vintage photo of Danny Hoffman et al. posing for a picture
  • a vintage photo of Danny Hoffman et al. posing for the camera
  • a vintage photo of Danny Hoffman et al. sitting on a bench
  • a vintage photo of Danny Hoffman sitting on a bench posing for the camera
  • an old photo of Danny Hoffman et al. posing for the camera
Etta Jones (3)

The entity Etta Jones is present in 3 descriptions.

  • Etta Jones et al. posing for a photo
  • Etta Jones et al. posing for a picture
  • Etta Jones et al. posing for the camera
Fred Stone (2)

The entity Fred Stone is present in 2 descriptions.

  • Fred Stone et al. posing for a photo
  • Fred Stone et al. posing for the camera
George MacDonald (1)

The entity George MacDonald is present in 1 descriptions.

  • an old photo of George MacDonald
Georgina Ward (16)

The entity Georgina Ward is present in 16 descriptions.

  • a vintage photo of Georgina Ward
  • a vintage photo of Georgina Ward et al. posing for the camera
  • a vintage photo of Georgina Ward holding a book
  • a vintage photo of Georgina Ward holding a book posing for the camera
  • a vintage photo of Georgina Ward holding a sign
  • a vintage photo of Georgina Ward holding a sign posing for the camera
  • an old photo of Georgina Ward
  • Georgina Ward et al. posing for a photo
  • Georgina Ward et al. posing for a photo in front of a newspaper
  • Georgina Ward holding a book
  • Georgina Ward holding a sign
  • Georgina Ward holding a sign posing for the camera
  • Georgina Ward is holding a book
  • Georgina Ward posing for a photo
  • Georgina Ward posing for the camera
  • old photo of Georgina Ward
Harold Stassen (9)

The entity Harold Stassen is present in 9 descriptions.

  • Harold Stassen et al. posing for a photo
  • Harold Stassen et al. posing for a picture
  • Harold Stassen et al. posing for the camera
  • Harold Stassen, Ruth Patrick posing for a photo
  • Harold Stassen, Ruth Patrick posing for a picture
  • Harold Stassen, Ruth Patrick posing for the camera
  • Harold Stassen standing in front of a mirror posing for the camera
  • Harold Stassen standing in front of a window
  • Harold Stassen standing in front of a window posing for the camera
Helen Hay Whitney (2)

The entity Helen Hay Whitney is present in 2 descriptions.

  • an old photo of Helen Hay Whitney
  • old photo of Helen Hay Whitney
James G. Blunt (3)

The entity James G. Blunt is present in 3 descriptions.

  • a close up of James G. Blunt holding a book
  • James G. Blunt holding a book
  • James G. Blunt holding a book posing for the camera
John J. Crittenden (15)

The entity John J. Crittenden is present in 15 descriptions.

  • a vintage photo of John J. Crittenden
  • a vintage photo of John J. Crittenden in a suit and tie
  • a vintage photo of John J. Crittenden wearing a suit and tie
  • an old photo of John J. Crittenden
  • an old photo of John J. Crittenden in a suit and tie
  • an old photo of John J. Crittenden wearing a suit and tie
  • John J. Crittenden holding a sign
  • John J. Crittenden holding a sign posing for the camera
  • John J. Crittenden posing for a photo
  • John J. Crittenden sitting in front of a book
  • John J. Crittenden sitting on a book
  • John J. Crittenden sitting on top of a book
  • John J. Crittenden standing in front of a sign
  • old photo of John J. Crittenden
  • old photo of John J. Crittenden in a suit standing in front of a building
John W. Daniel (4)

The entity John W. Daniel is present in 4 descriptions.

  • a vintage photo of John W. Daniel
  • a vintage photo of John W. Daniel holding a sign posing for the camera
  • John W. Daniel posing for a photo
  • John W. Daniel posing for the camera
Leon Osman (3)

The entity Leon Osman is present in 3 descriptions.

  • Leon Osman et al. standing around each other
  • Leon Osman et al. standing in front of a crowd
  • Leon Osman et al. standing in front of a crowd of people
Maria Spiridonova (1)

The entity Maria Spiridonova is present in 1 descriptions.

  • an old photo of Maria Spiridonova
Moore (1)

The entity Moore is present in 1 descriptions.

  • Belle Moore holding a sign
Osama bin Laden (2)

The entity Osama bin Laden is present in 2 descriptions.

  • Osama bin Laden standing in front of a window
  • Osama bin Laden standing next to a window
Paul Morphy (11)

The entity Paul Morphy is present in 11 descriptions.

  • a black and white photo of Paul Morphy in a suit and tie
  • a vintage photo of Paul Morphy in a suit and tie
  • a vintage photo of Paul Morphy in a suit posing for a picture
  • a vintage photo of Paul Morphy in black suit
  • a vintage photo of Paul Morphy wearing a suit and tie
  • an old photo of Paul Morphy
  • an old photo of Paul Morphy in a suit and tie
  • old photo of Paul Morphy
  • Paul Morphy in a suit and tie
  • Paul Morphy wearing a suit and tie
  • Paul Morphy wearing a suit and tie posing for a photo
Samuel (1)

The entity Samuel is present in 1 descriptions.

  • a vintage photo of Samuel A. Cartwright

The vocabulary of named entities contains 86 places.

Sample set of places:

"China (1)

The entity "China is present in 1 descriptions.

  • The image shows a plain white background with some text in the bottom right corner that reads "China Tiexi, Dusseldorf. 1997 registration LV 85 cm".
"Prague" (1)

The entity "Prague" is present in 1 descriptions.

  • The image contains text written in black ink on a white background. The text displays the number "2,000" followed by the word "Prague" written in a cursive style.
Brussels (1)

The entity Brussels is present in 1 descriptions.

  • The image shows the cover of a book or publication titled "LAOTSE TAO TE KING sechsundsiebzigster Spruch" (Tao Te King, the 76th verse) published by Bartleby & Co. in Brussels in 1998.
Bulgaria (2)

The entity Bulgaria is present in 2 descriptions.

  • Ferdinand I of Bulgaria in a room
  • Ferdinand I of Bulgaria with collar shirt
Downtown (1)

The entity Downtown is present in 1 descriptions.

  • This image appears to be a pink card with a printed address for Mr. Thomas Krens at the Guggenheim Museum Downtown in New York City. The address provided is 575 Broadway, New York, N.Y.
GA (1)

The entity GA is present in 1 descriptions.

  • The image shows the words "HAOS GA DAH" written in a decorative, swirling font using gold-colored lettering on a light cream-colored background.
Greece (36)

The entity Greece is present in 36 descriptions.

  • a close up of George I of Greece holding a sign
  • a close up of Princess Maria of Greece and Denmark
  • a old photo of George I of Greece
  • a photo of Princess Maria of Greece and Denmark
  • a vintage photo of George I of Greece
  • a vintage photo of George I of Greece holding a book
  • a vintage photo of George I of Greece holding a sign
  • a vintage photo of George I of Greece holding a sign posing for the camera
  • a vintage photo of George I of Greece in a suit and tie
  • a vintage photo of George I of Greece sitting in a chair
  • a vintage photo of George I of Greece wearing a suit and tie
  • a vintage photo of Princess Maria of Greece and Denmark and woman posing for a picture
  • a vintage photo of Princess Maria of Greece and Denmark et al. posing for a picture
  • a vintage photo of Princess Maria of Greece and Denmark et al. posing for the camera
  • an old photo of George I of Greece
  • an old photo of George I of Greece holding a book
  • an old photo of Prince Andrew of Greece and Denmark
  • an old photo of Princess Cecilie of Greece and Denmark
  • an old photo of Princess Cecilie of Greece and Denmark and woman posing for a picture
  • an old photo of Princess Maria of Greece and Denmark
  • George I of Greece holding a book
  • George I of Greece holding a sign
  • George I of Greece holding a sign posing for the camera
  • George I of Greece posing for a photo
  • George I of Greece posing for the camera
  • George I of Greece standing in front of a sign
  • George I of Greece wearing a suit and tie
  • old photo of George I of Greece
  • old photo of Princess Cecilie of Greece and Denmark et al. standing in front of a window
  • Prince Andrew of Greece and Denmark holding a box
  • Prince Andrew of Greece and Denmark in a box
  • Prince Nicholas of Greece and Denmark holding a sign
  • Prince Nicholas of Greece and Denmark posing for a photo
  • Princess Cecilie of Greece and Denmark, Bobby Jordan posing for a photo
  • Princess Cecilie of Greece and Denmark, Bobby Jordan posing for a picture
  • Princess Cecilie of Greece and Denmark, Bobby Jordan posing for the camera
Guadalupe (6)

The entity Guadalupe is present in 6 descriptions.

  • a vintage photo of Mariano Guadalupe Vallejo
  • a vintage photo of Mariano Guadalupe Vallejo in a suit and tie
  • a vintage photo of Mariano Guadalupe Vallejo wearing a suit and tie
  • an old photo of Mariano Guadalupe Vallejo
  • an old photo of Mariano Guadalupe Vallejo holding a book
  • Mariano Guadalupe Vallejo holding a book
Italy (7)

The entity Italy is present in 7 descriptions.

  • a black and white photo of Victor Emmanuel III of Italy
  • a vintage photo of Victor Emmanuel III of Italy
  • a vintage photo of Victor Emmanuel III of Italy et al. posing for a picture
  • a vintage photo of Victor Emmanuel III of Italy holding a sign
  • a vintage photo of Victor Emmanuel III of Italy holding a sign posing for the camera
  • a vintage photo of Victor Emmanuel III of Italy in a black shirt
  • Victor Emmanuel III of Italy posing for the camera
Lyon (3)

The entity Lyon is present in 3 descriptions.

  • an old photo of Lyon Playfair
  • an old photo of Lyon Playfair in a suit and tie
  • Lyon Playfair holding a sign
Montenegro (11)

The entity Montenegro is present in 11 descriptions.

  • a close up of Elena of Montenegro
  • a vintage photo of Elena of Montenegro
  • a vintage photo of Elena of Montenegro et al. posing for a photo
  • a vintage photo of Elena of Montenegro et al. posing for a picture
  • a vintage photo of Elena of Montenegro et al. posing for the camera
  • an old photo of Elena of Montenegro
  • close up of Elena of Montenegro
  • Elena of Montenegro posing for a photo
  • Elena of Montenegro posing for a picture
  • Elena of Montenegro posing for the camera
  • Elena of Montenegro taking a selfie
Morocco (3)

The entity Morocco is present in 3 descriptions.

  • an old photo of Princess Lalla Aicha of Morocco et al. in a room
  • an old photo of Princess Lalla Aicha of Morocco et al. standing in a room
  • Princess Lalla Aicha of Morocco et al. standing in a room
Netherlands (3)

The entity Netherlands is present in 3 descriptions.

  • a black and white photo of Wilhelmina of the Netherlands
  • an old black and white photo of Wilhelmina of the Netherlands
  • an old photo of Wilhelmina of the Netherlands
Rio (3)

The entity Rio is present in 3 descriptions.

  • Rio Reiser sitting in a chair
  • Rio Reiser wearing a black hat
  • Rio Reiser wearing a hat
Rowland Hill (2)

The entity Rowland Hill is present in 2 descriptions.

  • a vintage photo of Rowland Hill
  • a vintage photo of Rowland Hill holding a book
Serbia (14)

The entity Serbia is present in 14 descriptions.

  • a close up of Alexander I of Serbia in a suit and tie
  • a vintage photo of Natalie of Serbia
  • Alexander I of Serbia holding a sign
  • Alexander I of Serbia in a suit and tie
  • Alexander I of Serbia posing for a photo
  • Alexander I of Serbia posing for the camera
  • Alexander I of Serbia wearing a suit and tie
  • Alexander I of Serbia wearing a suit and tie posing for a photo
  • an old photo of Alexander I of Serbia
  • an old photo of Natalie of Serbia
  • Natalie of Serbia posing for a photo
  • Peter I of Serbia holding a sign
  • Peter I of Serbia holding a sign posing for the camera
  • Peter I of Serbia posing for a photo
Tennessee (3)

The entity Tennessee is present in 3 descriptions.

  • a vintage photo of Tennessee Williams in a suit and tie
  • a vintage photo of Tennessee Williams wearing a suit and tie
  • an old photo of Tennessee Williams wearing a suit and tie
Virginia (5)

The entity Virginia is present in 5 descriptions.

  • Virginia Mayo in front of a mirror posing for the camera
  • Virginia Mayo standing in front of a mirror posing for the camera
  • Virginia Weidler et al. posing for a photo
  • Virginia Weidler et al. posing for a picture
  • Virginia Weidler et al. posing for the camera
london (2)

The entity london is present in 2 descriptions.

  • a large clock tower towering over the city of london
  • a tall clock tower towering over the city of london
manila (1)

The entity manila is present in 1 descriptions.

  • The image shows a manila file folder. In the tab area of the folder, there is handwritten text in blue ink. The text reads "Orange Delta for A.P.S 1973 Improvements."

The vocabulary of named entities contains 24 organizations.

Sample set of organizations:

Andy Warhol Museum (1)

The entity Andy Warhol Museum is present in 1 descriptions.

  • a close up of a book with The Andy Warhol Museum in the background
Bartleby & Co. (1)

The entity Bartleby & Co. is present in 1 descriptions.

  • The image shows the cover of a book or publication titled "LAOTSE TAO TE KING sechsundsiebzigster Spruch" (Tao Te King, the 76th verse) published by Bartleby & Co. in Brussels in 1998.
Black Press Inc. (1)

The entity Black Press Inc. is present in 1 descriptions.

  • The image shows a plain, white envelope with a red label affixed to it. The label contains the text "The Letter Edged in Black Press Inc., 245 W. 80th St., New York, N.Y. 10024" in black print.
British Museum (1)

The entity British Museum is present in 1 descriptions.

  • The picture shows a drawing by Michelangelo Buonarroti. It depicts the Last Judgment. It is a sepia drawing on paper, 32.2 x 44.5 cm. It is in the collection of the British Museum, London.
British Museum". (1)

The entity British Museum". is present in 1 descriptions.

  • The image shows the cover of a book or portfolio titled "Drawings in British Museum". The cover has a plain, aged appearance with no additional text, images or ornamentation besides the title.
Bruton Parish Church (3)

The entity Bruton Parish Church is present in 3 descriptions.

  • a house that has a sign on the side of Bruton Parish Church
  • a sign in front of a house with Bruton Parish Church in the background
  • a sign on the side of a house with Bruton Parish Church in the background
Da Capo Press. (1)

The entity Da Capo Press. is present in 1 descriptions.

  • The image shows the cover of a book titled "The Mexican Portfolio" by Paul Strand, published by Da Capo Press. The book cover is made of brown paper or cardboard material.
Fogg Art Museum (1)

The entity Fogg Art Museum is present in 1 descriptions.

  • The image shows a record label for a sketch book by artist John Singer Sargent, which was gifted to Mrs. Francis Ormond. It is labeled as No. 1937.7.19 in the Fogg Art Museum collection.
Guggenheim Museum (1)

The entity Guggenheim Museum is present in 1 descriptions.

  • This image appears to be a pink card with a printed address for Mr. Thomas Krens at the Guggenheim Museum Downtown in New York City. The address provided is 575 Broadway, New York, N.Y.
Harvey (1)

The entity Harvey is present in 1 descriptions.

  • This is an image of a beige file folder tab with handwritten text in black ink. The text on the folder reads: "Dep. LA 1972" "Mgc 40" x 40" x 2 3/8" "Collection: Harvey & Ruth Wagner"
L'institut" (1)

The entity L'institut" is present in 1 descriptions.

  • The image appears to be a handwritten text with the title "La peruicheur de L'institut" written in cursive script. Below the title, there is an abstract, curving shape or symbol drawn in black ink.
Lincoln Memorial (26)

The entity Lincoln Memorial is present in 26 descriptions.

  • a group of baseball players posing for a photo with Lincoln Memorial in the background
  • a group of men posing for a photo with Lincoln Memorial in the background
  • a group of people posing for a photo with Lincoln Memorial in the background
  • a group of people posing for a picture with Lincoln Memorial in the background
  • a group of people posing for the camera with Lincoln Memorial in the background
  • a group of people standing in front of a window with Lincoln Memorial in the background
  • a man and a woman standing in front of a window with Lincoln Memorial in the background
  • a man sitting on a bench with Lincoln Memorial in the background
  • a man standing in front of a mirror with Lincoln Memorial in the background
  • a man standing in front of a window with Lincoln Memorial in the background
  • a person standing in front of a window with Lincoln Memorial in the background
  • a vintage photo of a group of people posing for a picture with Lincoln Memorial in the background
  • a vintage photo of a group of people posing for the camera with Lincoln Memorial in the background
  • a vintage photo of a man holding a book with Lincoln Memorial in the background
  • a vintage photo of a man in a room with Lincoln Memorial in the background
  • a vintage photo of a man sitting on a bench with Lincoln Memorial in the background
  • a vintage photo of a man standing in front of a book with Lincoln Memorial in the background
  • a vintage photo of a man with Lincoln Memorial in the background
  • a vintage photo of a person holding a book with Lincoln Memorial in the background
  • a vintage photo of a person standing in front of Lincoln Memorial
  • a vintage photo of a person with Lincoln Memorial in the background
  • a vintage photo of an old man standing in front of a book with Lincoln Memorial in the background
  • an old photo of a cake with Lincoln Memorial in the background
  • an old photo of a man with Lincoln Memorial in the background
  • an old photo of a person with Lincoln Memorial in the background
  • old photo of a person with Lincoln Memorial in the background
Luther King Jr. Memorial (3)

The entity Luther King Jr. Memorial is present in 3 descriptions.

  • a statue of a person with Martin Luther King Jr. Memorial in the background
  • a stone statue of a person with Martin Luther King Jr. Memorial in the background
  • an old photo of a person with Martin Luther King Jr. Memorial in the background
Pergamon Museum (3)

The entity Pergamon Museum is present in 3 descriptions.

  • a close up of a sign with Pergamon Museum in the background
  • a sign on a wall with Pergamon Museum in the background
  • close up of a sign with Pergamon Museum in the background
Petersburg Press. (1)

The entity Petersburg Press. is present in 1 descriptions.

  • The image shows the cover page of a book or publication titled "Vegetables Jim Dine" published by the Petersburg Press. The text is presented in a bold, black font against a white background.
Ruth (1)

The entity Ruth is present in 1 descriptions.

  • This is an image of a beige file folder tab with handwritten text in black ink. The text on the folder reads: "Dep. LA 1972" "Mgc 40" x 40" x 2 3/8" "Collection: Harvey & Ruth Wagner"
Salisbury Cathedral (3)

The entity Salisbury Cathedral is present in 3 descriptions.

  • a vintage photo of a church with Salisbury Cathedral in the background
  • a vintage photo of an old building with Salisbury Cathedral in the background
  • a vintage photo of an old church with Salisbury Cathedral in the background
The Limited Editions Club. (1)

The entity The Limited Editions Club. is present in 1 descriptions.

  • The image shows the cover of a book titled "Nohow On" by Samuel Beckett, with etchings by Robert Ryman. The book appears to be a limited edition published by The Limited Editions Club.
Wallace Ford (3)

The entity Wallace Ford is present in 3 descriptions.

  • a vintage photo of Wallace Ford et al. posing for a photo
  • a vintage photo of Wallace Ford et al. posing for a picture
  • a vintage photo of Wallace Ford et al. posing for the camera
red cross (1)

The entity red cross is present in 1 descriptions.

  • The image shows a metal can or container with a red cross symbol on it, and a screwdriver with a wooden handle.

1 Vocabularies are slow to compile so they are built about once a month. The current vocabulary was built on 2025-04-16.
2 Named entities are extracted using Compromise, a javascript NLP library. It's not exact, but pretty close.