Las Cabezas de San Juan Lighthouse
E736086
Las Cabezas de San Juan Lighthouse is a historic 19th-century coastal beacon and nature reserve landmark located on the northeastern tip of Puerto Rico.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Cape San Juan Lighthouse | 2 |
| Las Cabezas de San Juan Lighthouse canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8221159 — 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: Las Cabezas de San Juan Lighthouse Context triple: [Fajardo, hasLighthouse, Las Cabezas de San Juan Lighthouse]
-
A.
Culebrita Lighthouse
Culebrita Lighthouse is a historic 19th-century Spanish-era lighthouse located on the small island of Culebrita off Puerto Rico, known for guiding ships through the Virgin Passage and for its scenic, now-ruined structure.
-
B.
Boca Chita Lighthouse
Boca Chita Lighthouse is a small, historic ornamental lighthouse located on Boca Chita Key in Biscayne National Park, Florida, known as a picturesque landmark rather than an active navigational aid.
-
C.
Morro Jable Lighthouse
Morro Jable Lighthouse is a prominent coastal beacon and landmark on the southern coast of Fuerteventura in the Canary Islands, Spain.
-
D.
Cape Arago Lighthouse
Cape Arago Lighthouse is a historic coastal beacon on the Oregon coast, known for guiding ships near Coos Bay and serving as a prominent scenic landmark.
-
E.
West Chop Lighthouse
West Chop Lighthouse is a historic navigational beacon located on the West Chop headland in Vineyard Haven, Martha’s Vineyard, Massachusetts.
- 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: Las Cabezas de San Juan Lighthouse Target entity description: Las Cabezas de San Juan Lighthouse is a historic 19th-century coastal beacon and nature reserve landmark located on the northeastern tip of Puerto Rico.
-
A.
Culebrita Lighthouse
Culebrita Lighthouse is a historic 19th-century Spanish-era lighthouse located on the small island of Culebrita off Puerto Rico, known for guiding ships through the Virgin Passage and for its scenic, now-ruined structure.
-
B.
Boca Chita Lighthouse
Boca Chita Lighthouse is a small, historic ornamental lighthouse located on Boca Chita Key in Biscayne National Park, Florida, known as a picturesque landmark rather than an active navigational aid.
-
C.
Morro Jable Lighthouse
Morro Jable Lighthouse is a prominent coastal beacon and landmark on the southern coast of Fuerteventura in the Canary Islands, Spain.
-
D.
Cape Arago Lighthouse
Cape Arago Lighthouse is a historic coastal beacon on the Oregon coast, known for guiding ships near Coos Bay and serving as a prominent scenic landmark.
-
E.
West Chop Lighthouse
West Chop Lighthouse is a historic navigational beacon located on the West Chop headland in Vineyard Haven, Martha’s Vineyard, Massachusetts.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
historic site
ⓘ
lighthouse ⓘ |
| architecturalStyle | neoclassical architecture ⓘ |
| builtBy | Spanish colonial government of Puerto Rico NERFINISHED ⓘ |
| constructionStartDate | 1880 ⓘ |
| coordinates | approximately 18.38°N 65.62°W ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| era | Spanish colonial era ⓘ |
| function | coastal beacon ⓘ |
| hasLantern | yes ⓘ |
| hasViewOf |
El Yunque National Forest (distant view)
NERFINISHED
ⓘ
Icacos Island NERFINISHED ⓘ Palomino Island NERFINISHED ⓘ Vieques Island NERFINISHED ⓘ |
| heritageDesignation | listed on the U.S. National Register of Historic Places ⓘ |
| inaugurationDate | 1882 ⓘ |
| lightCharacteristic | white light with characteristic pattern (sector light) ⓘ |
| locatedIn |
Fajardo
NERFINISHED
ⓘ
Las Cabezas de San Juan Nature Reserve NERFINISHED ⓘ Puerto Rico ⓘ |
| locatedOn | northeastern tip of Puerto Rico ⓘ |
| managingOrganization | Conservación ConCiencia (through management of the reserve) ⓘ |
| materialUsed | masonry ⓘ |
| NRHPListingCountry | United States NERFINISHED ⓘ |
| NRHPType | building ⓘ |
| overlooks |
Atlantic Ocean
ⓘ
Vieques Sound NERFINISHED ⓘ |
| owner | Government of Puerto Rico NERFINISHED ⓘ |
| partOf | Las Cabezas de San Juan Nature Reserve NERFINISHED ⓘ |
| previousManagingOrganization | Puerto Rico Conservation Trust NERFINISHED ⓘ |
| purpose | aid to navigation ⓘ |
| regionServed |
approaches to Fajardo
ⓘ
shipping routes between Atlantic Ocean and Caribbean Sea ⓘ |
| significance |
important landmark for maritime navigation in northeastern Puerto Rico
ⓘ
one of the oldest lighthouses in Puerto Rico still in operation ⓘ |
| status | active lighthouse ⓘ |
| surroundedBy |
bioluminescent lagoon area
ⓘ
coastal dry forest ⓘ mangroves ⓘ |
| tourism | popular destination for visitors to Fajardo and eastern Puerto Rico ⓘ |
| towerShape | cylindrical tower with balcony and lantern ⓘ |
| usedFor |
environmental education
ⓘ
guided tours ⓘ historical interpretation ⓘ |
| yearCompleted | 1882 ⓘ |
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: Las Cabezas de San Juan Lighthouse Description of subject: Las Cabezas de San Juan Lighthouse is a historic 19th-century coastal beacon and nature reserve landmark located on the northeastern tip of Puerto Rico.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Cape San Juan Lighthouse
this entity surface form:
Cape San Juan Lighthouse