Long Point Light
E162959
Long Point Light is a historic lighthouse marking the entrance to Provincetown Harbor at the tip of Cape Cod, Massachusetts.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Long Point Light canonical | 9 |
| Long Point Light lighthouse | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1327373 — 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: Long Point Light Context triple: [Provincetown Harbor, hasNavigationAid, Long Point Light]
-
A.
Brant Point Light
Brant Point Light is a historic lighthouse on Nantucket Island, Massachusetts, guiding vessels into Nantucket Harbor and known as one of the oldest lighthouse sites in the United States.
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B.
Sankaty Head Light
Sankaty Head Light is a historic lighthouse on the eastern shore of Nantucket, Massachusetts, known for guiding ships along the treacherous waters off the island since the mid-19th century.
-
C.
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.
-
D.
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.
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E.
Nauset Light
Nauset Light is a historic, red-and-white lighthouse on Cape Cod in Massachusetts, known as an iconic coastal landmark and symbol of the region.
- 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: Long Point Light Target entity description: Long Point Light is a historic lighthouse marking the entrance to Provincetown Harbor at the tip of Cape Cod, Massachusetts.
-
A.
Brant Point Light
Brant Point Light is a historic lighthouse on Nantucket Island, Massachusetts, guiding vessels into Nantucket Harbor and known as one of the oldest lighthouse sites in the United States.
-
B.
Sankaty Head Light
Sankaty Head Light is a historic lighthouse on the eastern shore of Nantucket, Massachusetts, known for guiding ships along the treacherous waters off the island since the mid-19th century.
-
C.
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.
-
D.
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.
-
E.
Nauset Light
Nauset Light is a historic, red-and-white lighthouse on Cape Cod in Massachusetts, known as an iconic coastal landmark and symbol of the region.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
historic place
ⓘ
lighthouse ⓘ |
| access | accessible only by boat or on foot at low tide ⓘ |
| automated | true ⓘ |
| automationYear | 1952 ⓘ |
| category |
Buildings and structures in Provincetown, Massachusetts
ⓘ
Lighthouses in Massachusetts ⓘ Transportation in Barnstable County, Massachusetts ⓘ |
| constructionMaterial | brick ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| county |
Barnstable County
ⓘ
linked to:
Barnstable County, Massachusetts
|
| focalHeight | 35 feet ⓘ |
| hasFeature |
attached oil house
ⓘ
keeper’s dwelling site (no longer standing) ⓘ |
| hasMarking | white tower with black lantern ⓘ |
| heritageStatus | listed on the National Register of Historic Places ⓘ |
| lanternColor | black ⓘ |
| lightCharacteristic | flashing white light ⓘ |
| lightRange | 8 nautical miles ⓘ |
| locatedAt | tip of Cape Cod ⓘ |
| locatedIn |
Barnstable County, Massachusetts
ⓘ
Cape Cod ⓘ Massachusetts ⓘ Provincetown Harbor ⓘ Provincetown, Massachusetts ⓘ
linked to:
Provincetown
United States ⓘ
linked to:
United States of America
|
| locatedOn |
Long Point
ⓘ
barrier spit at the end of Cape Cod ⓘ |
| managedBy | United States Coast Guard ⓘ |
| marks | entrance to Provincetown Harbor ⓘ |
| navigationArea | approaches to Provincetown Harbor ⓘ |
| nearbyCity | Provincetown ⓘ |
| operatedBy | United States Coast Guard ⓘ |
| originalLensType | Fresnel lens ⓘ |
| purpose | aid to navigation ⓘ |
| region | New England ⓘ |
| state | Massachusetts ⓘ |
| status | active aid to navigation ⓘ |
| towerColor | white ⓘ |
| towerShape | square tower ⓘ |
| waterway | Cape Cod Bay ⓘ |
| yearLit | 1875 ⓘ |
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: Long Point Light Description of subject: Long Point Light is a historic lighthouse marking the entrance to Provincetown Harbor at the tip of Cape Cod, Massachusetts.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Long Point Light