Point Reyes Lighthouse
E115497
Point Reyes Lighthouse is a historic 19th-century coastal beacon on the Point Reyes headland in California, known for its dramatic cliffside setting and powerful foghorn guiding ships through the often treacherous waters off Marin County.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Point Reyes Lighthouse canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T845083 — 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: Point Reyes Lighthouse Context triple: [Marin County, hasLandmark, Point Reyes Lighthouse]
-
A.
Cape Mendocino Lighthouse
Cape Mendocino Lighthouse is a historic coastal beacon on California’s rugged north coast that once guided ships navigating the hazardous waters off Cape Mendocino.
-
B.
Heceta Head Lighthouse
Heceta Head Lighthouse is a historic, highly photographed beacon perched on a scenic cliff along the central Oregon Coast, renowned for its powerful light and picturesque setting.
-
C.
Point Sur Lighthouse
Point Sur Lighthouse is a historic 19th-century light station perched on a volcanic rock along California’s Big Sur coast, guiding ships along the rugged Pacific shoreline.
-
D.
Yaquina Head Lighthouse
Yaquina Head Lighthouse is a historic, still-operating beacon near Newport that is the tallest lighthouse on the Oregon Coast and a popular coastal landmark.
-
E.
Anacapa Island Lighthouse
Anacapa Island Lighthouse is a historic navigational beacon on Anacapa Island off the coast of California, guiding ships through the Santa Barbara Channel.
- 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: Point Reyes Lighthouse Target entity description: Point Reyes Lighthouse is a historic 19th-century coastal beacon on the Point Reyes headland in California, known for its dramatic cliffside setting and powerful foghorn guiding ships through the often treacherous waters off Marin County.
-
A.
Cape Mendocino Lighthouse
Cape Mendocino Lighthouse is a historic coastal beacon on California’s rugged north coast that once guided ships navigating the hazardous waters off Cape Mendocino.
-
B.
Heceta Head Lighthouse
Heceta Head Lighthouse is a historic, highly photographed beacon perched on a scenic cliff along the central Oregon Coast, renowned for its powerful light and picturesque setting.
-
C.
Point Sur Lighthouse
Point Sur Lighthouse is a historic 19th-century light station perched on a volcanic rock along California’s Big Sur coast, guiding ships along the rugged Pacific shoreline.
-
D.
Yaquina Head Lighthouse
Yaquina Head Lighthouse is a historic, still-operating beacon near Newport that is the tallest lighthouse on the Oregon Coast and a popular coastal landmark.
-
E.
Anacapa Island Lighthouse
Anacapa Island Lighthouse is a historic navigational beacon on Anacapa Island off the coast of California, guiding ships through the Santa Barbara Channel.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
historic site
ⓘ
lighthouse ⓘ tourist attraction ⓘ |
| architecturalStyle | 19th-century lighthouse ⓘ |
| builtFor | United States Lighthouse Board ⓘ |
| category |
Buildings and structures in Marin County, California
ⓘ
Lighthouses in California ⓘ Tourist attractions in Marin County, California ⓘ |
| constructionEndYear | 1870 ⓘ |
| constructionStartYear | 1869 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county | Marin County ⓘ |
| hasFeature |
Fresnel lens
ⓘ
cliffside setting ⓘ foghorn ⓘ stairway with many steps ⓘ |
| hasStatus |
automated
ⓘ
decommissioned as manned station ⓘ |
| hasViewOf |
Pacific Ocean
ⓘ
rocky coastline ⓘ |
| heritageDesignation | historic structure ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Marin County ⓘ
surface form:
Marin County, California
Point Reyes Headlands ⓘ Point Reyes National Seashore ⓘ |
| locatedInProtectedArea | Point Reyes National Seashore ⓘ |
| locatedNear |
Point Reyes Station
ⓘ
surface form:
Point Reyes Station, California
|
| locatedOn |
Pacific coast
ⓘ
Point Reyes Headlands ⓘ
surface form:
Point Reyes Peninsula
|
| locatedOnCliff | yes ⓘ |
| managedBy | National Park Service ⓘ |
| materialUsed |
brick
ⓘ
iron ⓘ |
| nearby |
Point Reyes Headlands
ⓘ
surface form:
Point Reyes Headlands cliffs
Point Reyes National Seashore Visitor Center ⓘ |
| notableFor |
dramatic coastal scenery
ⓘ
frequent fog ⓘ powerful foghorn ⓘ strong winds ⓘ |
| openToPublic | yes ⓘ |
| operatedBy |
United States Coast Guard
ⓘ
surface form:
United States Coast Guard (historically)
|
| overlooks |
Gulf of the Farallones
ⓘ
Pacific Ocean ⓘ |
| ownedBy | National Park Service ⓘ |
| purpose |
aid to navigation
ⓘ
guiding ships through fog ⓘ |
| region | Northern California ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| yearCompleted | 1870 ⓘ |
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: Point Reyes Lighthouse Description of subject: Point Reyes Lighthouse is a historic 19th-century coastal beacon on the Point Reyes headland in California, known for its dramatic cliffside setting and powerful foghorn guiding ships through the often treacherous waters off Marin County.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.