Gibraltar Point Lighthouse
E102951
Gibraltar Point Lighthouse is a historic early-19th-century stone lighthouse located on the Toronto Islands, known as one of the oldest surviving lighthouses on the Great Lakes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Gibraltar Point Lighthouse canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T789144 — 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: Gibraltar Point Lighthouse Context triple: [Toronto Islands, hasAttraction, Gibraltar Point Lighthouse]
-
A.
Chatham Lighthouse
Chatham Lighthouse is a historic coastal beacon on Cape Cod in Massachusetts, renowned for guiding ships through the treacherous waters off Chatham.
-
B.
Elie Lighthouse
Elie Lighthouse is a coastal navigational beacon near the village of Elie in Fife, Scotland, guiding ships along the Firth of Forth.
-
C.
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.
-
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.
Drum Point Lighthouse
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.
- 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: Gibraltar Point Lighthouse Target entity description: Gibraltar Point Lighthouse is a historic early-19th-century stone lighthouse located on the Toronto Islands, known as one of the oldest surviving lighthouses on the Great Lakes.
-
A.
Chatham Lighthouse
Chatham Lighthouse is a historic coastal beacon on Cape Cod in Massachusetts, renowned for guiding ships through the treacherous waters off Chatham.
-
B.
Elie Lighthouse
Elie Lighthouse is a coastal navigational beacon near the village of Elie in Fife, Scotland, guiding ships along the Firth of Forth.
-
C.
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.
-
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.
Drum Point Lighthouse
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.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
historic building
ⓘ
lighthouse ⓘ stone lighthouse ⓘ |
| associatedEvent | mysterious death of John Paul Radelmüller in 1815 ⓘ |
| associatedWith | Toronto Harbour ⓘ |
| bodyOfWater | Lake Ontario ⓘ |
| builtInPeriod | early 19th century ⓘ |
| category |
19th-century lighthouses in Canada
ⓘ
Buildings and structures in Toronto ⓘ Lighthouses in Ontario ⓘ Tourist attractions in Toronto ⓘ |
| city | Toronto ⓘ |
| constructionMaterial | limestone ⓘ |
| constructionStartYear | 1808 ⓘ |
| coordinatesApprox | 43.613°N 79.381°W ⓘ |
| country | Canada ⓘ |
| firstKeeper | John Paul Radelmüller ⓘ |
| function | aid to navigation ⓘ |
| hasLegend | ghost story of the first lighthouse keeper ⓘ |
| heritageDesignation |
historic site
ⓘ
listed heritage property of Toronto ⓘ |
| laterLighting | fresnel lens ⓘ |
| lightDeactivatedYear | 1958 ⓘ |
| locatedIn |
Canada
ⓘ
Ontario ⓘ Toronto ⓘ |
| locatedOn |
Toronto Islands
ⓘ
surface form:
Centre Island area of Toronto Islands
|
| location | Toronto Islands ⓘ |
| managedBy |
Toronto
ⓘ
surface form:
City of Toronto
|
| material | stone ⓘ |
| near | Gibraltar Point ⓘ |
| notableFor |
being one of the oldest surviving lighthouses on the Great Lakes
ⓘ
early 19th-century stone construction ⓘ |
| oneOfTheOldestOn | Great Lakes ⓘ |
| openToPublic | yes ⓘ |
| originalLighting | whale oil lamps ⓘ |
| ownedBy |
Toronto
ⓘ
surface form:
City of Toronto
|
| province | Ontario ⓘ |
| region | Great Lakes ⓘ |
| shape | tapered octagonal tower ⓘ |
| status | decommissioned ⓘ |
| tourism | local tourist attraction ⓘ |
| towerHeight |
approximately 25 metres
ⓘ
approximately 82 feet ⓘ |
| yearCompleted | 1808 ⓘ |
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: Gibraltar Point Lighthouse Description of subject: Gibraltar Point Lighthouse is a historic early-19th-century stone lighthouse located on the Toronto Islands, known as one of the oldest surviving lighthouses on the Great Lakes.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.