David Brock
E686308
David Brock is an American political operative and media figure known for his transformation from conservative journalist to prominent liberal activist and founder of the media watchdog group Media Matters for America.
All labels observed (1)
| Label | Occurrences |
|---|---|
| David Brock canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7749288 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: David Brock Context triple: [Brock, hasNotableBearer, David Brock]
-
A.
David Sirota
David Sirota is an American journalist, author, and political commentator who co-wrote the screenplay for the satirical disaster film "Don't Look Up."
-
B.
Howard Kurtz
Howard Kurtz is an American journalist and media critic best known for hosting media analysis programs on Fox News and CNN and for his long-running media column in The Washington Post.
-
C.
John Nichols
John Nichols is an American local politician serving as the mayor of College Station, Texas.
-
D.
John Nichols
John Nichols is an American journalist and author known for his progressive political commentary and work with The Nation magazine.
-
E.
John Nichols
John Nichols is an American novelist best known for works such as "The Sterile Cuckoo" and his politically charged "New Mexico Trilogy."
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: David Brock Target entity description: David Brock is an American political operative and media figure known for his transformation from conservative journalist to prominent liberal activist and founder of the media watchdog group Media Matters for America.
-
A.
David Sirota
David Sirota is an American journalist, author, and political commentator who co-wrote the screenplay for the satirical disaster film "Don't Look Up."
-
B.
Howard Kurtz
Howard Kurtz is an American journalist and media critic best known for hosting media analysis programs on Fox News and CNN and for his long-running media column in The Washington Post.
-
C.
John Nichols
John Nichols is an American local politician serving as the mayor of College Station, Texas.
-
D.
John Nichols
John Nichols is an American journalist and author known for his progressive political commentary and work with The Nation magazine.
-
E.
John Nichols
John Nichols is an American novelist best known for works such as "The Sterile Cuckoo" and his politically charged "New Mexico Trilogy."
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
human
ⓘ
journalist ⓘ media executive ⓘ political operative ⓘ |
| countryOfCitizenship | United States of America ⓘ |
| educatedAt | University of California, Berkeley ⓘ |
| familyName | Brock ⓘ |
| fieldOfWork |
media criticism
ⓘ
opposition research ⓘ politics ⓘ |
| founded |
American Bridge 21st Century
ⓘ
Correct the Record ⓘ Media Matters Action Network ⓘ Media Matters for America ⓘ Shareblue ⓘ |
| genre | political non-fiction ⓘ |
| givenName | David ⓘ |
| languageOfWorkOrName | English ⓘ |
| movement |
Democratic Party (United States)
ⓘ
linked to:
Democratic Party
|
| notableFor |
criticizing conservative media
ⓘ
founding Media Matters for America ⓘ later repudiating his earlier conservative writings ⓘ media criticism ⓘ opposition research against Republicans ⓘ supporting Democratic Party candidates ⓘ transition from conservative to liberal political activism ⓘ writing critical works on Anita Hill ⓘ |
| notableWork |
Bestseller
ⓘ
Blinded by the Right ⓘ Brocked ⓘ Free Ride: John McCain and the Media ⓘ Killing the Messenger ⓘ
linked to:
Kill the Messenger
Landslide ⓘ One Party Country ⓘ The Fox Effect ⓘ The Real Anita Hill ⓘ The Republican Noise Machine ⓘ The Seduction of Hillary Rodham ⓘ |
| occupation |
author
ⓘ
journalist ⓘ media proprietor ⓘ political activist ⓘ |
| politicalAlignment | liberalism in the United States ⓘ |
| positionHeld |
chairman of American Bridge 21st Century
ⓘ
chairman of Correct the Record ⓘ chairman of Media Matters for America ⓘ |
| previousPoliticalAlignment | American conservatism ⓘ |
| residence | Washington, D.C. ⓘ |
| sexOrGender | male ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: David Brock Description of subject: David Brock is an American political operative and media figure known for his transformation from conservative journalist to prominent liberal activist and founder of the media watchdog group Media Matters for America.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.