David Greenglass
E663520
David Greenglass was an American machinist and spy who provided atomic secrets to the Soviet Union and whose testimony helped convict his sister and brother-in-law, Ethel and Julius Rosenberg, in a famous Cold War espionage case.
All labels observed (1)
| Label | Occurrences |
|---|---|
| David Greenglass canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7433247 — 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 Greenglass Context triple: [Soviet atomic bomb project (indirectly, via espionage), notableSpy, David Greenglass]
-
A.
Don Brodie
Don Brodie was an American character actor known for his numerous supporting roles in Hollywood films from the 1930s through the 1960s.
-
B.
Joseph Kroll
Joseph Kroll was a 19th-century German restaurateur and impresario whose entertainment venue in Berlin evolved into the renowned Kroll Opera House.
-
C.
Jerome Hellman
Jerome Hellman was an American film producer best known for his Academy Award–winning work on influential films of the late 1960s and 1970s.
-
D.
Jack Rosenthal
Jack Rosenthal was a British playwright and screenwriter renowned for his television dramas and film work, including contributions to acclaimed adaptations and character-driven stories.
-
E.
Hersh Wasser
Hersh Wasser was a Jewish historian and archivist best known as one of the key organizers and preservers of the clandestine Warsaw Ghetto archive known as the Ringelblum Archive.
- 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 Greenglass Target entity description: David Greenglass was an American machinist and spy who provided atomic secrets to the Soviet Union and whose testimony helped convict his sister and brother-in-law, Ethel and Julius Rosenberg, in a famous Cold War espionage case.
-
A.
Don Brodie
Don Brodie was an American character actor known for his numerous supporting roles in Hollywood films from the 1930s through the 1960s.
-
B.
Joseph Kroll
Joseph Kroll was a 19th-century German restaurateur and impresario whose entertainment venue in Berlin evolved into the renowned Kroll Opera House.
-
C.
Jerome Hellman
Jerome Hellman was an American film producer best known for his Academy Award–winning work on influential films of the late 1960s and 1970s.
-
D.
Jack Rosenthal
Jack Rosenthal was a British playwright and screenwriter renowned for his television dramas and film work, including contributions to acclaimed adaptations and character-driven stories.
-
E.
Hersh Wasser
Hersh Wasser was a Jewish historian and archivist best known as one of the key organizers and preservers of the clandestine Warsaw Ghetto archive known as the Ringelblum Archive.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
human
ⓘ
machinist ⓘ spy ⓘ |
| causeOfNotability | Cold War atomic espionage ⓘ |
| convictedOf | conspiracy to commit espionage ⓘ |
| country | United States of America ⓘ |
| countryOfCitizenship | United States of America ⓘ |
| covertAllegiance | Soviet Union NERFINISHED ⓘ |
| dateOfBirth | 1922-03-02 ⓘ |
| dateOfDeath | 2014-07-01 ⓘ |
| employer | Los Alamos Laboratory NERFINISHED ⓘ |
| ethnicGroup | Jewish Americans NERFINISHED ⓘ |
| familyName | Greenglass NERFINISHED ⓘ |
| fieldOfWork |
espionage
ⓘ
nuclear weapons ⓘ |
| genre | political scandal ⓘ |
| givenName | David NERFINISHED ⓘ |
| hasRole |
atomic spy
ⓘ
witness for the prosecution ⓘ |
| involvedIn | Rosenberg trial NERFINISHED ⓘ |
| languageSpoken | English ⓘ |
| memberOf | Rosenberg spy ring NERFINISHED ⓘ |
| militaryBranch | United States Army ⓘ |
| notableEvent |
testified against Ethel Rosenberg
ⓘ
testified against Julius Rosenberg ⓘ |
| notableFor |
key testimony in the Rosenberg espionage case
ⓘ
providing atomic secrets to the Soviet Union ⓘ |
| notableWork | espionage for the Soviet Union ⓘ |
| occupation |
machinist
ⓘ
soldier ⓘ spy ⓘ |
| participantIn |
Cold War espionage
NERFINISHED
ⓘ
Manhattan Project NERFINISHED ⓘ |
| placeOfBirth |
Manhattan
ⓘ
New York NERFINISHED ⓘ New York City ⓘ United States of America ⓘ |
| placeOfDeath |
New York
NERFINISHED
ⓘ
New York City ⓘ United States of America ⓘ |
| relative |
Ethel Rosenberg
NERFINISHED
ⓘ
Julius Rosenberg NERFINISHED ⓘ |
| residence | New York City ⓘ |
| sexOrGender | male ⓘ |
| sibling | Ethel Rosenberg NERFINISHED ⓘ |
| spouse | Ruth Greenglass NERFINISHED ⓘ |
| workLocation |
Los Alamos, New Mexico
NERFINISHED
ⓘ
New York City ⓘ |
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 Greenglass Description of subject: David Greenglass was an American machinist and spy who provided atomic secrets to the Soviet Union and whose testimony helped convict his sister and brother-in-law, Ethel and Julius Rosenberg, in a famous Cold War espionage case.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.