Three Sisters of Nauset lighthouses
E190821
The Three Sisters of Nauset lighthouses are a historic trio of former coastal beacons in Eastham, Massachusetts, known for guiding ships along Cape Cod’s treacherous outer shore in the 19th and early 20th centuries.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Three Sisters of Nauset lighthouses canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1537586 — 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: Three Sisters of Nauset lighthouses Context triple: [Eastham, hasLandmark, Three Sisters of Nauset lighthouses]
-
A.
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.
-
B.
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.
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C.
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.
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D.
Gay Head Light
Gay Head Light is a historic lighthouse on the cliffs of Aquinnah, Martha’s Vineyard, known for guiding maritime traffic and its distinctive red-brick tower overlooking the Atlantic.
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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: Three Sisters of Nauset lighthouses Target entity description: The Three Sisters of Nauset lighthouses are a historic trio of former coastal beacons in Eastham, Massachusetts, known for guiding ships along Cape Cod’s treacherous outer shore in the 19th and early 20th centuries.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
Gay Head Light
Gay Head Light is a historic lighthouse on the cliffs of Aquinnah, Martha’s Vineyard, known for guiding maritime traffic and its distinctive red-brick tower overlooking the Atlantic.
-
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 (44)
| Predicate | Object |
|---|---|
| instanceOf |
historic lighthouse group
ⓘ
navigational aid ⓘ |
| associatedWith |
19th-century maritime trade along the U.S. East Coast
ⓘ
shipping hazards off Nauset Beach ⓘ |
| builtFor | United States Lighthouse Board ⓘ |
| category |
buildings and structures in Eastham, Massachusetts
ⓘ
lighthouses completed in the 19th century ⓘ lighthouses on the National Register of Historic Places in Massachusetts ⓘ tourist attractions in Barnstable County, Massachusetts ⓘ |
| constructionMaterial | wood ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county |
Barnstable County, Massachusetts
ⓘ
surface form:
Barnstable County
|
| currentUse | historic exhibit ⓘ |
| deactivatedAsCoastalLights | early 20th century ⓘ |
| designedTo | create a distinctive light pattern for mariners ⓘ |
| firstLightingYear | 1838 ⓘ |
| hasComponent |
first Sister tower
ⓘ
second Sister tower ⓘ third Sister tower ⓘ |
| heritageStatus | listed on the National Register of Historic Places ⓘ |
| lightCharacteristic | three fixed white lights in a row ⓘ |
| locatedIn |
Cape Cod National Seashore
ⓘ
Eastham ⓘ
surface form:
Eastham, Massachusetts
|
| locatedOn | Cape Cod ⓘ |
| managedBy | National Park Service ⓘ |
| marking | white towers with black lanterns ⓘ |
| movedFromOriginalSite | true ⓘ |
| near |
Nauset Light
ⓘ
Nauset Beach ⓘ
surface form:
Nauset Light Beach
|
| NRHPListingYear | 1987 ⓘ |
| NRHPReferenceNumber | 87001488 ⓘ |
| numberOfTowers | 3 ⓘ |
| openToPublic | true ⓘ |
| originalPurpose | to guide ships along Cape Cod’s outer shore ⓘ |
| ownedBy |
United States government
ⓘ
surface form:
United States federal government
|
| partOf | historic resources of Cape Cod National Seashore ⓘ |
| reconstructed | 1892 ⓘ |
| replaced | earlier single Nauset lighthouse tower ⓘ |
| significance |
associated with maritime history of Cape Cod
ⓘ
example of early American coastal navigation system ⓘ |
| state | Massachusetts ⓘ |
| tourAvailability | seasonal guided tours ⓘ |
| towerShape | cylindrical ⓘ |
| waterbodyServed | Atlantic Ocean ⓘ |
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: Three Sisters of Nauset lighthouses Description of subject: The Three Sisters of Nauset lighthouses are a historic trio of former coastal beacons in Eastham, Massachusetts, known for guiding ships along Cape Cod’s treacherous outer shore in the 19th and early 20th centuries.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.