Marblehead Light
E671792
Marblehead Light is a historic lighthouse in Marblehead, Massachusetts, that aids navigation in Massachusetts Bay and is notable for its skeletal iron tower design.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Marblehead Light canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7479934 — 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: Marblehead Light Context triple: [Marblehead, Massachusetts, hasLandmark, Marblehead Light]
-
A.
Cape Elizabeth Light
Cape Elizabeth Light is a historic twin lighthouse station on Cape Elizabeth, Maine, that aids navigation along the rocky Atlantic coast near Portland.
-
B.
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.
-
C.
Portsmouth Harbor Lighthouse
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.
-
D.
Bass Harbor Head Light
Bass Harbor Head Light is a historic lighthouse perched on rugged cliffs at the southwestern tip of Mount Desert Island in Maine, overlooking the entrance to Bass Harbor.
-
E.
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.
- 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: Marblehead Light Target entity description: Marblehead Light is a historic lighthouse in Marblehead, Massachusetts, that aids navigation in Massachusetts Bay and is notable for its skeletal iron tower design.
-
A.
Cape Elizabeth Light
Cape Elizabeth Light is a historic twin lighthouse station on Cape Elizabeth, Maine, that aids navigation along the rocky Atlantic coast near Portland.
-
B.
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.
-
C.
Portsmouth Harbor Lighthouse
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.
-
D.
Bass Harbor Head Light
Bass Harbor Head Light is a historic lighthouse perched on rugged cliffs at the southwestern tip of Mount Desert Island in Maine, overlooking the entrance to Bass Harbor.
-
E.
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
historic site
ⓘ
lighthouse ⓘ navigational aid ⓘ |
| access | accessible by land ⓘ |
| associatedWith | United States Coast Guard Aids to Navigation system NERFINISHED ⓘ |
| automationStatus | automated ⓘ |
| constructionMaterial | iron ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| currentLensType | modern optic ⓘ |
| focalHeight | 130 feet ⓘ |
| foundationMaterial | concrete ⓘ |
| foundationType | concrete piles ⓘ |
| function |
coastal light
ⓘ
harbor entrance light ⓘ |
| hasCategory |
Buildings and structures in Marblehead, Massachusetts
ⓘ
Lighthouses in Massachusetts ⓘ Transportation in Essex County, Massachusetts ⓘ |
| height | 105 feet ⓘ |
| lightCharacteristic |
Fl G 6s
ⓘ
flashing green light ⓘ |
| locatedIn |
Essex County, Massachusetts
ⓘ
Massachusetts ⓘ United States of America ⓘ
surface form:
United States
|
| locatedInWaterBody | Massachusetts Bay NERFINISHED ⓘ |
| locatedNear |
Marblehead Harbor
NERFINISHED
ⓘ
Salem Sound NERFINISHED ⓘ |
| locatedOn | Marblehead Neck NERFINISHED ⓘ |
| location | Marblehead, Massachusetts NERFINISHED ⓘ |
| managedBy | United States Coast Guard NERFINISHED ⓘ |
| marking |
brown skeletal tower
ⓘ
green beacon ⓘ |
| notableFor |
being one of the few skeletal lighthouses in New England
ⓘ
skeletal iron tower design ⓘ |
| originalLensType | Fresnel lens NERFINISHED ⓘ |
| owner | Town of Marblehead NERFINISHED ⓘ |
| powerSource | electric ⓘ |
| publicAccess |
grounds open to the public
ⓘ
tower closed to the public ⓘ |
| purpose |
aids navigation in Massachusetts Bay
ⓘ
marks the entrance to Marblehead Harbor ⓘ |
| region | New England NERFINISHED ⓘ |
| replaced | earlier stone lighthouse on the site ⓘ |
| state | Massachusetts ⓘ |
| status | active ⓘ |
| towerShape | pyramidal skeletal tower ⓘ |
| towerType | skeletal tower ⓘ |
| town | Marblehead NERFINISHED ⓘ |
| yearLit | 1896 ⓘ |
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: Marblehead Light Description of subject: Marblehead Light is a historic lighthouse in Marblehead, Massachusetts, that aids navigation in Massachusetts Bay and is notable for its skeletal iron tower design.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.