Grassy Knoll
E6806
The Grassy Knoll is a small, sloping, tree-lined area in Dallas, Texas, best known as a focal point of conspiracy theories surrounding the assassination of President John F. Kennedy.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Grassy Knoll canonical | 6 |
| Grassy Knoll at Dealey Plaza | 1 |
| grassy knoll area of Dealey Plaza | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T65035 — 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: Grassy Knoll Context triple: [Dealey Plaza, hasPart, Grassy Knoll]
-
A.
Silver Hill
Silver Hill is a small commuter rail station in Weston, Massachusetts, served by the MBTA's Fitchburg Line.
-
B.
Dealey Plaza
Dealey Plaza is a historic public square in downtown Dallas best known as the site of President John F. Kennedy’s assassination in 1963.
-
C.
Haymarket
Haymarket is a small historic town in Prince William County, Northern Virginia, known for its quaint downtown and proximity to Washington, D.C.
-
D.
Seven Corners
Seven Corners is a densely developed commercial and residential area in Fairfax County, Northern Virginia, known for its major road junction and large shopping centers.
-
E.
Altmark Incident
The Altmark Incident was a 1940 World War II naval confrontation in Norwegian waters, where British forces boarded the German tanker Altmark to free imprisoned Allied sailors, heightening tensions during the early "Phoney War" period.
- 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: Grassy Knoll Target entity description: The Grassy Knoll is a small, sloping, tree-lined area in Dallas, Texas, best known as a focal point of conspiracy theories surrounding the assassination of President John F. Kennedy.
-
A.
Silver Hill
Silver Hill is a small commuter rail station in Weston, Massachusetts, served by the MBTA's Fitchburg Line.
-
B.
Dealey Plaza
Dealey Plaza is a historic public square in downtown Dallas best known as the site of President John F. Kennedy’s assassination in 1963.
-
C.
Haymarket
Haymarket is a small historic town in Prince William County, Northern Virginia, known for its quaint downtown and proximity to Washington, D.C.
-
D.
Seven Corners
Seven Corners is a densely developed commercial and residential area in Fairfax County, Northern Virginia, known for its major road junction and large shopping centers.
-
E.
Altmark Incident
The Altmark Incident was a 1940 World War II naval confrontation in Norwegian waters, where British forces boarded the German tanker Altmark to free imprisoned Allied sailors, heightening tensions during the early "Phoney War" period.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
geographic feature
ⓘ
urban park area ⓘ |
| adjacentTo |
Dealey Plaza
ⓘ
surface form:
Dealey Plaza reflecting pool
Elm Street ⓘ |
| appearsIn |
films dramatizing the JFK assassination
ⓘ
numerous JFK assassination documentaries ⓘ numerous books about the JFK assassination ⓘ |
| associatedWithDate | 1963-11-22 ⓘ |
| associatedWithEvent | assassination of John F. Kennedy ⓘ |
| associatedWithPerson |
Abraham Zapruder
ⓘ
John F. Kennedy ⓘ Lee Harvey Oswald ⓘ |
| category |
Conspiracy theory locations
ⓘ
JFK assassination sites ⓘ Parks in Dallas ⓘ |
| governedBy |
Dallas, Texas
ⓘ
surface form:
City of Dallas
|
| hasCharacteristic |
grassy
ⓘ
sloping ⓘ small ⓘ tree-lined ⓘ |
| hasCulturalReference | symbol of government conspiracy in American culture ⓘ |
| hasNameOrigin | descriptive term referring to its grassy, knoll-like shape ⓘ |
| hasNearbyMemorial |
John F. Kennedy Plaza
ⓘ
surface form:
John F. Kennedy Memorial Plaza
|
| hasNearbyMuseum | The Sixth Floor Museum at Dealey Plaza ⓘ |
| hasNearbyStructure |
concrete retaining wall
ⓘ
pergola ⓘ stockade fence ⓘ |
| hasRoleIn | conspiracy theories about the assassination of John F. Kennedy ⓘ |
| hasViewOf | Elm Street motorcade route ⓘ |
| locatedIn |
Dallas, Texas
ⓘ
surface form:
Dallas
Dallas County, Texas ⓘ
surface form:
Dallas County
Dealey Plaza ⓘ Texas ⓘ United States of America ⓘ
surface form:
United States
|
| near |
John F. Kennedy assassination site
ⓘ
Texas School Book Depository ⓘ |
| notableFor |
being alleged location of a second gunman in JFK assassination theories
ⓘ
prominence in JFK assassination research and popular culture ⓘ |
| partOf |
Dealey Plaza
ⓘ
surface form:
Dealey Plaza National Historic Landmark District
Downtown Dallas ⓘ
surface form:
downtown Dallas
|
| touristAttraction | true ⓘ |
| visitedFor |
JFK assassination tours
ⓘ
historical significance ⓘ |
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: Grassy Knoll Description of subject: The Grassy Knoll is a small, sloping, tree-lined area in Dallas, Texas, best known as a focal point of conspiracy theories surrounding the assassination of President John F. Kennedy.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Elm Street (Dallas)
subject surface form:
Houston Street (Dallas)
this entity surface form:
Grassy Knoll at Dealey Plaza
this entity surface form:
grassy knoll area of Dealey Plaza