Portsmouth Harbor Lighthouse
E475677
Portsmouth Harbor Lighthouse is a historic coastal beacon in New Castle, New Hampshire, that has guided ships at the mouth of the Piscataqua River for centuries and is now a preserved maritime landmark.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Portsmouth Harbor Light | 4 |
| Portsmouth Harbor Lighthouse canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4740208 — 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: Portsmouth Harbor Lighthouse Context triple: [Portsmouth, New Hampshire, hasHistoricSite, Portsmouth Harbor Lighthouse]
-
A.
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.
-
B.
West Chop Lighthouse
West Chop Lighthouse is a historic navigational beacon located on the West Chop headland in Vineyard Haven, Martha’s Vineyard, Massachusetts.
-
C.
Chatham Lighthouse
Chatham Lighthouse is a historic coastal beacon on Cape Cod in Massachusetts, renowned for guiding ships through the treacherous waters off Chatham.
-
D.
Sandy Hook Lighthouse
Sandy Hook Lighthouse is the oldest surviving lighthouse in the United States, located at the tip of New Jersey’s Sandy Hook peninsula and historically guiding ships into New York Harbor.
-
E.
Prospect Point Lighthouse
Prospect Point Lighthouse is a historic coastal beacon located at the northern tip of Vancouver’s Stanley Park, overlooking the entrance to Burrard Inlet.
- 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: Portsmouth Harbor Lighthouse Target entity description: Portsmouth Harbor Lighthouse is a historic coastal beacon in New Castle, New Hampshire, that has guided ships at the mouth of the Piscataqua River for centuries and is now a preserved maritime landmark.
-
A.
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.
-
B.
West Chop Lighthouse
West Chop Lighthouse is a historic navigational beacon located on the West Chop headland in Vineyard Haven, Martha’s Vineyard, Massachusetts.
-
C.
Chatham Lighthouse
Chatham Lighthouse is a historic coastal beacon on Cape Cod in Massachusetts, renowned for guiding ships through the treacherous waters off Chatham.
-
D.
Sandy Hook Lighthouse
Sandy Hook Lighthouse is the oldest surviving lighthouse in the United States, located at the tip of New Jersey’s Sandy Hook peninsula and historically guiding ships into New York Harbor.
-
E.
Prospect Point Lighthouse
Prospect Point Lighthouse is a historic coastal beacon located at the northern tip of Vancouver’s Stanley Park, overlooking the entrance to Burrard Inlet.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
historic site
ⓘ
lighthouse ⓘ tourist attraction ⓘ |
| associatedWith |
Fort Constitution State Historic Site
NERFINISHED
ⓘ
Portsmouth Harbor defenses NERFINISHED ⓘ |
| automated | yes ⓘ |
| automationYear | 1960s ⓘ |
| constructionMaterial |
brick lining
ⓘ
cast iron ⓘ |
| coordinates | approximately 43.071°N 70.708°W ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| currentOpticType | modern optic ⓘ |
| currentUse |
active aid to navigation
ⓘ
heritage tourism site ⓘ |
| focalHeight | about 56 feet ⓘ |
| function | aids to navigation ⓘ |
| height | about 48 feet ⓘ |
| heritageDesignation | listed on the National Register of Historic Places (as part of Fort Constitution) ⓘ |
| historicUse | guiding ships into Portsmouth Harbor ⓘ |
| lanternColor | black ⓘ |
| lightCharacteristic |
flashing green
ⓘ
period 4 seconds ⓘ |
| locatedIn |
Fort Point
NERFINISHED
ⓘ
New Castle, New Hampshire NERFINISHED ⓘ New Hampshire ⓘ Piscataqua River mouth NERFINISHED ⓘ Portsmouth Harbor NERFINISHED ⓘ Rockingham County, New Hampshire NERFINISHED ⓘ |
| locatedNear |
Kittery, Maine
NERFINISHED
ⓘ
Portsmouth, New Hampshire NERFINISHED ⓘ |
| locatedOnBodyOfWater | Atlantic Ocean NERFINISHED ⓘ |
| locatedOnWaterway | Piscataqua River NERFINISHED ⓘ |
| locatedWithin | Fort Constitution NERFINISHED ⓘ |
| managedBy | United States Coast Guard NERFINISHED ⓘ |
| nearbyFeature |
Fort McClary
NERFINISHED
ⓘ
Whaleback Lighthouse NERFINISHED ⓘ |
| openToPublic | yes ⓘ |
| originalLensType | sixth-order Fresnel lens ⓘ |
| ownedBy | United States government ⓘ |
| partOf | maritime heritage of New Hampshire ⓘ |
| preservedBy | Friends of Portsmouth Harbor Lighthouses NERFINISHED ⓘ |
| publicAccess | seasonal tours ⓘ |
| range | about 12 nautical miles ⓘ |
| towerColor | white ⓘ |
| towerShape | conical ⓘ |
| yearLit | 1878 ⓘ |
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: Portsmouth Harbor Lighthouse Description of subject: Portsmouth Harbor Lighthouse is a historic coastal beacon in New Castle, New Hampshire, that has guided ships at the mouth of the Piscataqua River for centuries and is now a preserved maritime landmark.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Portsmouth Harbor Light
this entity surface form:
Portsmouth Harbor Light
this entity surface form:
Portsmouth Harbor Light
this entity surface form:
Portsmouth Harbor Light