Fort Mahon (site)
E675643
Fort Mahon (site) is a former Union Army earthwork fortification that was part of the Civil War defensive ring protecting Washington, D.C.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fort Mahon (site) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7586389 — 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 Mahon (site) Context triple: [Civil War Defenses of Washington, hasPart, Fort Mahon (site)]
-
A.
Fort Napoléon des Saintes
Fort Napoléon des Saintes is a 19th-century hilltop fortress and museum on Terre-de-Haut in the Îles des Saintes, Guadeloupe, known for its panoramic views and historical military architecture.
-
B.
Fortifications of Toulon
The Fortifications of Toulon are a system of coastal and urban defenses in the French port city of Toulon, renowned as a major example of the military engineering of Sébastien Le Prestre de Vauban.
-
C.
Longues-sur-Mer battery
The Longues-sur-Mer battery is a well-preserved German coastal artillery site from World War II in Normandy, France, that played a key role during the D-Day landings and is now a major historical landmark.
-
D.
Fort Saint-Elme
Fort Saint-Elme is a historic coastal fortress in southern France overlooking the Mediterranean, known for its star-shaped Renaissance military architecture and panoramic views of the Côte Vermeille.
-
E.
Fort Delgrès
Fort Delgrès is a historic 17th–18th century French military fortress in Basse-Terre, Guadeloupe, notable for its role in resistance to the re-establishment of slavery and its commanding views over the Caribbean Sea.
- 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 Mahon (site) Target entity description: Fort Mahon (site) is a former Union Army earthwork fortification that was part of the Civil War defensive ring protecting Washington, D.C.
-
A.
Fort Napoléon des Saintes
Fort Napoléon des Saintes is a 19th-century hilltop fortress and museum on Terre-de-Haut in the Îles des Saintes, Guadeloupe, known for its panoramic views and historical military architecture.
-
B.
Fortifications of Toulon
The Fortifications of Toulon are a system of coastal and urban defenses in the French port city of Toulon, renowned as a major example of the military engineering of Sébastien Le Prestre de Vauban.
-
C.
Longues-sur-Mer battery
The Longues-sur-Mer battery is a well-preserved German coastal artillery site from World War II in Normandy, France, that played a key role during the D-Day landings and is now a major historical landmark.
-
D.
Fort Saint-Elme
Fort Saint-Elme is a historic coastal fortress in southern France overlooking the Mediterranean, known for its star-shaped Renaissance military architecture and panoramic views of the Côte Vermeille.
-
E.
Fort Delgrès
Fort Delgrès is a historic 17th–18th century French military fortress in Basse-Terre, Guadeloupe, notable for its role in resistance to the re-establishment of slavery and its commanding views over the Caribbean Sea.
- F. None of above. chosen
Statements (14)
| Predicate | Object |
|---|---|
| instanceOf |
Civil War fortification
ⓘ
Union Army fort ⓘ earthwork fortification ⓘ |
| builtFor | defense of Washington, D.C. ⓘ |
| conflict | American Civil War ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| currentUse | historic site ⓘ |
| heritageStatus | former fortification ⓘ |
| locatedIn |
Northeast Washington, D.C.
ⓘ
Washington, D.C. ⓘ |
| namedAfter | Union officer Mahon (disputed/uncertain) ⓘ |
| partOf |
Civil War defensive ring protecting Washington, D.C.
ⓘ
Defenses of Washington ⓘ |
| usedBy | Union Army ⓘ |
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 Mahon (site) Description of subject: Fort Mahon (site) is a former Union Army earthwork fortification that was part of the Civil War defensive ring protecting Washington, D.C.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.