Fort Washington Lighthouse
E195935
Fort Washington Lighthouse is a historic navigational beacon on the Potomac River in Maryland that aids maritime traffic near the nation’s capital.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fort Washington Lighthouse canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1568125 — 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 Washington Lighthouse Context triple: [National Capital Parks-East, hasPart, Fort Washington Lighthouse]
-
A.
Cape May Lighthouse
Cape May Lighthouse is a historic 19th-century coastal beacon and popular tourist attraction located at the southern tip of New Jersey.
-
B.
Eastern Point Lighthouse
Eastern Point Lighthouse is a historic coastal beacon in Gloucester, Massachusetts, guiding ships at the entrance to Gloucester Harbor on the Atlantic Ocean.
-
C.
Baron Bliss Lighthouse
Baron Bliss Lighthouse is a prominent coastal beacon and memorial in Belize, honoring the English benefactor Baron Bliss and serving as a notable historic symbol of Belize City.
-
D.
Roosevelt Island Lighthouse
Roosevelt Island Lighthouse is a historic 19th-century stone lighthouse located at the northern tip of Roosevelt Island in New York City, known for its distinctive Gothic Revival design and role as a local landmark.
-
E.
Cape Henry Lighthouse
Cape Henry Lighthouse is a historic coastal beacon at the entrance to the Chesapeake Bay, notable as one of the earliest federally funded public works in the United States.
- 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 Washington Lighthouse Target entity description: Fort Washington Lighthouse is a historic navigational beacon on the Potomac River in Maryland that aids maritime traffic near the nation’s capital.
-
A.
Cape May Lighthouse
Cape May Lighthouse is a historic 19th-century coastal beacon and popular tourist attraction located at the southern tip of New Jersey.
-
B.
Eastern Point Lighthouse
Eastern Point Lighthouse is a historic coastal beacon in Gloucester, Massachusetts, guiding ships at the entrance to Gloucester Harbor on the Atlantic Ocean.
-
C.
Baron Bliss Lighthouse
Baron Bliss Lighthouse is a prominent coastal beacon and memorial in Belize, honoring the English benefactor Baron Bliss and serving as a notable historic symbol of Belize City.
-
D.
Roosevelt Island Lighthouse
Roosevelt Island Lighthouse is a historic 19th-century stone lighthouse located at the northern tip of Roosevelt Island in New York City, known for its distinctive Gothic Revival design and role as a local landmark.
-
E.
Cape Henry Lighthouse
Cape Henry Lighthouse is a historic coastal beacon at the entrance to the Chesapeake Bay, notable as one of the earliest federally funded public works in the United States.
- F. None of above. chosen
Statements (27)
| Predicate | Object |
|---|---|
| instanceOf |
historic place
ⓘ
lighthouse ⓘ navigational aid ⓘ |
| automationStatus | automated ⓘ |
| constructionMaterial | brick ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| focalHeight | about 32 feet ⓘ |
| function |
aid to navigation
ⓘ
maritime safety ⓘ |
| height | about 28 feet ⓘ |
| heritageDesignation | listed on the National Register of Historic Places (as part of Fort Washington) ⓘ |
| lightCharacteristic | flashing white light ⓘ |
| locatedIn |
Maryland
ⓘ
Prince George’s County, Maryland ⓘ
surface form:
Prince George's County, Maryland
|
| locatedNear | Washington, D.C. ⓘ |
| locatedOn | Potomac River ⓘ |
| locatedWithin | Fort Washington Park ⓘ |
| managedBy |
National Park Service
ⓘ
surface form:
United States National Park Service
|
| marking | white tower with black lantern ⓘ |
| originalLensType | Fresnel lens ⓘ |
| ownedBy |
United States government
ⓘ
surface form:
United States federal government
|
| status | active ⓘ |
| towerColor | white ⓘ |
| towerShape | square tower ⓘ |
| waterwayServed |
Potomac River
ⓘ
surface form:
Potomac River shipping channel
approaches to Washington, D.C. ⓘ |
| yearLit | 1857 ⓘ |
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 Washington Lighthouse Description of subject: Fort Washington Lighthouse is a historic navigational beacon on the Potomac River in Maryland that aids maritime traffic near the nation’s capital.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
National Capital Parks-East