Fort Greble
E676255
Fort Greble was a Union Army earthwork fortification built to help defend Washington, D.C., during the American Civil War.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Fort Greble canonical | 5 |
| Fort Greble Park | 2 |
| Fort Greble (Civil War fort) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7586373 — 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: Fort Greble Context triple: [Civil War Defenses of Washington, hasPart, Fort Greble]
-
A.
Fort DeRussy
Fort DeRussy is a former U.S. Army coastal defense installation in Honolulu, Hawaii, now largely serving as a military recreation area and green space near Waikiki.
-
B.
Fort Gratiot
Fort Gratiot was a 19th-century U.S. Army fortification in Michigan that guarded the strategic junction of the St. Clair River and Lake Huron.
-
C.
Fort Cronkhite
Fort Cronkhite is a former World War II-era coastal defense fortification in Marin County, California, now preserved as part of the Golden Gate National Recreation Area and used for recreation and historic interpretation.
-
D.
Fort Bokar
Fort Bokar is a prominent 15th-century stone fortress guarding the seaward entrance to Dubrovnik’s Old City walls in Croatia.
-
E.
Fort Gulick
Fort Gulick was a former United States Army installation in the Panama Canal Zone that played a key role in regional military operations and training during the 20th century.
- 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: Fort Greble Target entity description: Fort Greble was a Union Army earthwork fortification built to help defend Washington, D.C., during the American Civil War.
-
A.
Fort DeRussy
Fort DeRussy is a former U.S. Army coastal defense installation in Honolulu, Hawaii, now largely serving as a military recreation area and green space near Waikiki.
-
B.
Fort Gratiot
Fort Gratiot was a 19th-century U.S. Army fortification in Michigan that guarded the strategic junction of the St. Clair River and Lake Huron.
-
C.
Fort Cronkhite
Fort Cronkhite is a former World War II-era coastal defense fortification in Marin County, California, now preserved as part of the Golden Gate National Recreation Area and used for recreation and historic interpretation.
-
D.
Fort Bokar
Fort Bokar is a prominent 15th-century stone fortress guarding the seaward entrance to Dubrovnik’s Old City walls in Croatia.
-
E.
Fort Gulick
Fort Gulick was a former United States Army installation in the Panama Canal Zone that played a key role in regional military operations and training during the 20th century.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
Civil War fortification
ⓘ
Union Army fort ⓘ |
| builtBy | Union Army engineers ⓘ |
| conflict | American Civil War ⓘ |
| constructedAs | earthwork fortification ⓘ |
| controlledBy | Union Army ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| era | 19th century ⓘ |
| function | protect approaches to Washington, D.C. from the south ⓘ |
| garrison | Union Army troops ⓘ |
| hasCategory |
American Civil War forts
ⓘ
Defenses of Washington, D.C., during the American Civil War ⓘ
linked to:
Union defenses of Washington, D.C.
Forts in Washington, D.C. ⓘ |
| heritageStatus | no longer extant as a complete fort ⓘ |
| locatedIn |
District of Columbia
ⓘ
Washington, D.C. ⓘ |
| locatedNear |
Potomac River
ⓘ
Washington Navy Yard ⓘ |
| locatedOn | east side of the Potomac River ⓘ |
| material | earthworks ⓘ |
| militaryBranch | United States Army ⓘ |
| namedAfter |
John Trout Greble
ⓘ
Lieutenant John T. Greble ⓘ |
| namedFor | first regular Army officer killed in the American Civil War ⓘ |
| partOf |
Defenses of Washington
ⓘ
ring of forts around Washington, D.C. ⓘ |
| startTime |
American Civil War era
ⓘ
linked to:
American Civil War
|
| status | demolished ⓘ |
| usedFor | defense of Washington, D.C. ⓘ |
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: Fort Greble Description of subject: Fort Greble was a Union Army earthwork fortification built to help defend Washington, D.C., during the American Civil War.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Fort Greble
linked to: Fort Greble
linked to: Fort Greble