John Greer
E870570
John Greer is a primary antagonist in the TV series "Person of Interest," known as the shadowy leader of the clandestine organization Decima Technologies.
All labels observed (1)
| Label | Occurrences |
|---|---|
| John Greer canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T10558926 — 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: John Greer Context triple: [John Nolan, notableRole, John Greer]
-
A.
Ian Greer
Ian Greer is a British academic and medical researcher who serves as the President and Vice-Chancellor of Queen’s University Belfast.
-
B.
John Lane
John Lane is a relatively common personal name shared by multiple individuals across various professions, including politics, sports, and the arts.
-
C.
Ronald Lockley
Ronald Lockley was a Welsh naturalist, ornithologist, and author renowned for his pioneering seabird research and influential nature writing.
-
D.
Roderic Hill
Roderic Hill was a British air chief marshal and academic leader who served as Rector of Imperial College London after a distinguished career in the Royal Air Force.
-
E.
John Seale
John Seale is an Australian cinematographer renowned for his Academy Award–winning work on films such as "The English Patient" and his visually striking collaborations with major directors.
- 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: John Greer Target entity description: John Greer is a primary antagonist in the TV series "Person of Interest," known as the shadowy leader of the clandestine organization Decima Technologies.
-
A.
Ian Greer
Ian Greer is a British academic and medical researcher who serves as the President and Vice-Chancellor of Queen’s University Belfast.
-
B.
John Lane
John Lane is a relatively common personal name shared by multiple individuals across various professions, including politics, sports, and the arts.
-
C.
Ronald Lockley
Ronald Lockley was a Welsh naturalist, ornithologist, and author renowned for his pioneering seabird research and influential nature writing.
-
D.
Roderic Hill
Roderic Hill was a British air chief marshal and academic leader who served as Rector of Imperial College London after a distinguished career in the Royal Air Force.
-
E.
John Seale
John Seale is an Australian cinematographer renowned for his Academy Award–winning work on films such as "The English Patient" and his visually striking collaborations with major directors.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
fictional character
ⓘ
television character ⓘ |
| affiliation | Decima Technologies ⓘ |
| appearsIn | Person of Interest ⓘ |
| appearsInSeason |
Season 2
ⓘ
Season 3 ⓘ Season 4 ⓘ Season 5 ⓘ |
| associatedWith | Samaritan ⓘ |
| basedInUniverse |
Person of Interest universe
ⓘ
linked to:
Person of Interest
|
| characterTrait |
calculating
ⓘ
ideologically driven ⓘ ruthless ⓘ |
| createdBy | Jonathan Nolan ⓘ |
| deathCause | suicide by Samaritan kill-switch activation ⓘ |
| employer | Decima Technologies ⓘ |
| enemyOf |
Harold Finch
ⓘ
John Reese ⓘ Root ⓘ Sameen Shaw ⓘ The Machine ⓘ |
| firstAppearance |
Person of Interest Season 2
ⓘ
linked to:
Person of Interest
|
| formerAffiliation | MI6 ⓘ |
| formerOccupation | MI6 officer ⓘ |
| gender | male ⓘ |
| genreOfWork | science fiction television series ⓘ |
| goal |
activate Samaritan
ⓘ
give Samaritan global surveillance power ⓘ |
| ideology | belief in benevolent AI control ⓘ |
| killedBy | Samaritan (indirectly) ⓘ |
| languageSpoken | English ⓘ |
| method |
manipulation of governments and corporations
ⓘ
use of surveillance technology ⓘ |
| narrativeRole |
primary antagonist
ⓘ
villain ⓘ |
| nationality | British ⓘ |
| notableFor |
leading Decima Technologies
ⓘ
pursuing control of the artificial intelligence Samaritan ⓘ |
| occupation |
corporate executive
ⓘ
intelligence operative ⓘ |
| operatesIn |
United Kingdom
ⓘ
United States ⓘ
linked to:
United States of America
global ⓘ |
| portrayedBy | John Nolan ⓘ |
| position |
head of Decima
ⓘ
leader of Decima Technologies ⓘ |
| roleIn | Person of Interest ⓘ |
| species | human ⓘ |
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: John Greer Description of subject: John Greer is a primary antagonist in the TV series "Person of Interest," known as the shadowy leader of the clandestine organization Decima Technologies.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.