Drum Point Lighthouse
E102448
Drum Point Lighthouse is a historic screw-pile lighthouse originally built in the 19th century to mark the entrance to Maryland’s Patuxent River and now preserved as a museum exhibit.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Drum Point Lighthouse canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T785808 — 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: Drum Point Lighthouse Context triple: [Calvert County, Maryland, hasHistoricSite, Drum Point Lighthouse]
-
A.
Boca Chita Lighthouse
Boca Chita Lighthouse is a small, historic ornamental lighthouse located on Boca Chita Key in Biscayne National Park, Florida, known as a picturesque landmark rather than an active navigational aid.
-
B.
Great Point Light
Great Point Light is a historic lighthouse located at the northern tip of Nantucket Island, Massachusetts, guiding vessels through the surrounding coastal waters.
-
C.
Ponce de Leon Inlet Lighthouse
The Ponce de Leon Inlet Lighthouse is a historic 19th-century brick lighthouse near Daytona Beach, Florida, renowned as one of the tallest and best-preserved lighthouses in the United States.
-
D.
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.
-
E.
Cape Poge Lighthouse
Cape Poge Lighthouse is a historic coastal beacon on Chappaquiddick Island in Massachusetts, known for guiding ships through the waters off Martha’s Vineyard.
- 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: Drum Point Lighthouse Target entity description: Drum Point Lighthouse is a historic screw-pile lighthouse originally built in the 19th century to mark the entrance to Maryland’s Patuxent River and now preserved as a museum exhibit.
-
A.
Boca Chita Lighthouse
Boca Chita Lighthouse is a small, historic ornamental lighthouse located on Boca Chita Key in Biscayne National Park, Florida, known as a picturesque landmark rather than an active navigational aid.
-
B.
Great Point Light
Great Point Light is a historic lighthouse located at the northern tip of Nantucket Island, Massachusetts, guiding vessels through the surrounding coastal waters.
-
C.
Ponce de Leon Inlet Lighthouse
The Ponce de Leon Inlet Lighthouse is a historic 19th-century brick lighthouse near Daytona Beach, Florida, renowned as one of the tallest and best-preserved lighthouses in the United States.
-
D.
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.
-
E.
Cape Poge Lighthouse
Cape Poge Lighthouse is a historic coastal beacon on Chappaquiddick Island in Massachusetts, known for guiding ships through the waters off Martha’s Vineyard.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
historic site
ⓘ
lighthouse ⓘ museum exhibit ⓘ screw-pile lighthouse ⓘ |
| automated | 1944 ⓘ |
| builtBy | United States Lighthouse Board ⓘ |
| constructionEnd | 1883 ⓘ |
| constructionStart | 1882 ⓘ |
| constructionType | screw-pile foundation ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| currentUse | museum exhibit ⓘ |
| deactivated | 1962 ⓘ |
| focalHeight | about 46 feet ⓘ |
| function | to guide vessels entering the Patuxent River ⓘ |
| hasExhibitsOn |
Chesapeake Bay maritime history
ⓘ
lighthouse keepers’ lives ⓘ |
| hasFeature |
gallery deck
ⓘ
keeper’s quarters ⓘ lantern room ⓘ |
| laterPowerSource | electricity ⓘ |
| lightCharacteristic | original fixed white light ⓘ |
| listedOn | National Register of Historic Places ⓘ |
| locatedIn |
Calvert County, Maryland
ⓘ
Maryland ⓘ Solomons, Maryland ⓘ |
| locatedNear | Chesapeake Bay ⓘ |
| locatedOn | Patuxent River ⓘ |
| managedBy | Calvert Marine Museum ⓘ |
| marks | entrance to the Patuxent River ⓘ |
| material |
cast-iron piles
ⓘ
wooden superstructure ⓘ |
| notableFor |
one of the few surviving Chesapeake Bay screw-pile lighthouses
ⓘ
well-preserved screw-pile design ⓘ |
| nrhpListingYear | 1973 ⓘ |
| nrhpType | building ⓘ |
| offers | guided tours ⓘ |
| openToPublic | true ⓘ |
| originalPurpose | aid to navigation ⓘ |
| powerSource | originally oil lamp ⓘ |
| preservedAs | historic lighthouse museum ⓘ |
| region | Chesapeake Bay region ⓘ |
| relocatedTo | Calvert Marine Museum ⓘ |
| removedFromOriginalSite | 1975 ⓘ |
| servedShipping |
Chesapeake Bay traffic
ⓘ
Patuxent River traffic ⓘ |
| shape | hexagonal cottage-style structure ⓘ |
| towerHeight | about 40 feet ⓘ |
| yearLit | 1883 ⓘ |
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: Drum Point Lighthouse Description of subject: Drum Point Lighthouse is a historic screw-pile lighthouse originally built in the 19th century to mark the entrance to Maryland’s Patuxent River and now preserved as a museum exhibit.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.