Chatham Lighthouse
E90253
Chatham Lighthouse is a historic coastal beacon on Cape Cod in Massachusetts, renowned for guiding ships through the treacherous waters off Chatham.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Chatham Lighthouse canonical | 6 |
| Chatham Light | 2 |
| Chatham Lighthouse Beach | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T710538 — 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: Chatham Lighthouse Context triple: [Chatham, knownFor, Chatham Lighthouse]
-
A.
Elie Lighthouse
Elie Lighthouse is a coastal navigational beacon near the village of Elie in Fife, Scotland, guiding ships along the Firth of Forth.
-
B.
Round Island Lighthouse
Round Island Lighthouse is a historic red-and-white beacon located on Round Island in Michigan, guiding ships through the Straits of Mackinac in the Great Lakes.
-
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.
Ten Pound Island Light
Ten Pound Island Light is a historic lighthouse located on Ten Pound Island in Gloucester Harbor, Massachusetts, that once guided maritime traffic into the busy fishing port.
-
E.
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.
- 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: Chatham Lighthouse Target entity description: Chatham Lighthouse is a historic coastal beacon on Cape Cod in Massachusetts, renowned for guiding ships through the treacherous waters off Chatham.
-
A.
Elie Lighthouse
Elie Lighthouse is a coastal navigational beacon near the village of Elie in Fife, Scotland, guiding ships along the Firth of Forth.
-
B.
Round Island Lighthouse
Round Island Lighthouse is a historic red-and-white beacon located on Round Island in Michigan, guiding ships through the Straits of Mackinac in the Great Lakes.
-
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.
Ten Pound Island Light
Ten Pound Island Light is a historic lighthouse located on Ten Pound Island in Gloucester Harbor, Massachusetts, that once guided maritime traffic into the busy fishing port.
-
E.
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.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
historic site
ⓘ
lighthouse ⓘ |
| alsoKnownAs |
Chatham Lighthouse
ⓘ
surface form:
Chatham Light
Twin Lights of Chatham ⓘ |
| associatedWith |
maritime navigation on Cape Cod
ⓘ
shipwrecks off Chatham ⓘ |
| category |
Buildings and structures in Chatham, Massachusetts
ⓘ
Lighthouses in Massachusetts ⓘ Tourist attractions in Barnstable County, Massachusetts ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county |
Barnstable County, Massachusetts
ⓘ
surface form:
Barnstable County
|
| function | guides ships through waters off Chatham ⓘ |
| hasStructure |
keeper’s house
ⓘ
light tower ⓘ |
| heritage | historic coastal beacon ⓘ |
| locatedAt | Morris Island Road, Chatham, Massachusetts ⓘ |
| locatedInProtectedArea | Cape Cod coastal environment ⓘ |
| locatedOn | Cape Cod ⓘ |
| location | Chatham, Massachusetts ⓘ |
| managedBy | United States Coast Guard Station Chatham ⓘ |
| marking | white tower ⓘ |
| near |
Chatham Bars
ⓘ
Monomoy Island ⓘ |
| notableFor | guiding ships through treacherous waters off Chatham ⓘ |
| operatedBy | United States Coast Guard ⓘ |
| overlooks | Atlantic Ocean ⓘ |
| purpose | aid to navigation ⓘ |
| region | New England ⓘ |
| state | Massachusetts ⓘ |
| status | active lighthouse ⓘ |
| tourism | popular tourist attraction ⓘ |
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: Chatham Lighthouse Description of subject: Chatham Lighthouse is a historic coastal beacon on Cape Cod in Massachusetts, renowned for guiding ships through the treacherous waters off Chatham.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Chatham Lighthouse Beach
this entity surface form:
Chatham Light
this entity surface form:
Chatham Light