Concord Point Lighthouse
E879258
Concord Point Lighthouse is a historic 19th-century beacon on the Chesapeake Bay, known as one of the oldest continuously operating lighthouses in Maryland.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Concord Point Lighthouse canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10690450 — 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: Concord Point Lighthouse Context triple: [Havre de Grace, Maryland, hasLandmark, Concord Point Lighthouse]
-
A.
Brown’s Point Lighthouse
Brown’s Point Lighthouse is a historic navigational beacon on Puget Sound in Tacoma, Washington, known for guiding maritime traffic and its preserved keeper’s cottage.
-
B.
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.
-
C.
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.
-
D.
Jones Point Lighthouse
Jones Point Lighthouse is a historic 19th-century river lighthouse located on the Potomac River near Alexandria, Virginia, notable as one of the last remaining riverine lighthouses in the United States.
-
E.
Stony Point Lighthouse
Stony Point Lighthouse is a historic navigational beacon on the Hudson River in New York, notable as one of the oldest lighthouses in the state and part of the Stony Point Battlefield State Historic Site.
- 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: Concord Point Lighthouse Target entity description: Concord Point Lighthouse is a historic 19th-century beacon on the Chesapeake Bay, known as one of the oldest continuously operating lighthouses in Maryland.
-
A.
Brown’s Point Lighthouse
Brown’s Point Lighthouse is a historic navigational beacon on Puget Sound in Tacoma, Washington, known for guiding maritime traffic and its preserved keeper’s cottage.
-
B.
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.
-
C.
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.
-
D.
Jones Point Lighthouse
Jones Point Lighthouse is a historic 19th-century river lighthouse located on the Potomac River near Alexandria, Virginia, notable as one of the last remaining riverine lighthouses in the United States.
-
E.
Stony Point Lighthouse
Stony Point Lighthouse is a historic navigational beacon on the Hudson River in New York, notable as one of the oldest lighthouses in the state and part of the Stony Point Battlefield State Historic Site.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
historic site
ⓘ
lighthouse ⓘ |
| category |
Buildings and structures in Harford County, Maryland
ⓘ
Lighthouses in Maryland ⓘ Tourist attractions in Harford County, Maryland ⓘ Transportation infrastructure on the National Register of Historic Places in Maryland ⓘ |
| centuryBuilt | 19th century ⓘ |
| city | Havre de Grace NERFINISHED ⓘ |
| completionDate | 1827 ⓘ |
| constructionStartDate | 1827 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county | Harford County NERFINISHED ⓘ |
| firstLit | 1827 ⓘ |
| hasFeature | adjacent keeper’s house ⓘ |
| hasRestoration |
20th-century restoration
ⓘ
21st-century restoration ⓘ |
| height | about 36 feet ⓘ |
| heritageDesignation |
Maryland historic landmark
ⓘ
listed on the National Register of Historic Places ⓘ |
| historicUse | guiding ships on Chesapeake Bay ⓘ |
| isOneOf | oldest continuously operating lighthouses in Maryland ⓘ |
| lightCharacteristic | fixed white ⓘ |
| locatedAtMouthOf | Susquehanna River NERFINISHED ⓘ |
| locatedIn |
Harford County, Maryland
NERFINISHED
ⓘ
Havre de Grace, Maryland NERFINISHED ⓘ Maryland ⓘ United States of America ⓘ
surface form:
United States
|
| locatedOn | Chesapeake Bay NERFINISHED ⓘ |
| managingOrganization | Friends of Concord Point Lighthouse NERFINISHED ⓘ |
| marking | white tower ⓘ |
| material | stone ⓘ |
| near |
Havre de Grace Promenade
NERFINISHED
ⓘ
mouth of the Susquehanna River ⓘ |
| openToPublic | yes ⓘ |
| owner | City of Havre de Grace NERFINISHED ⓘ |
| powerSource |
later electrified
ⓘ
originally oil lamp ⓘ |
| purpose | aid to navigation ⓘ |
| region |
Mid-Atlantic states
ⓘ
surface form:
Mid-Atlantic United States
|
| state | Maryland ⓘ |
| tourism | popular local attraction ⓘ |
| towerShape | conical tower ⓘ |
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: Concord Point Lighthouse Description of subject: Concord Point Lighthouse is a historic 19th-century beacon on the Chesapeake Bay, known as one of the oldest continuously operating lighthouses in Maryland.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.