House Island (Casco Bay)
E668735
House Island (Casco Bay) is a small privately owned island in Portland Harbor, Maine, historically known for its coastal fortifications and use as an immigration quarantine station.
All labels observed (1)
| Label | Occurrences |
|---|---|
| House Island (Casco Bay) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7470885 — 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: House Island (Casco Bay) Context triple: [Casco Bay islands, hasPart, House Island (Casco Bay)]
-
A.
Westport Island, Maine
Westport Island, Maine is a small coastal town situated on an island in Lincoln County known for its scenic waterfront, rural character, and maritime heritage.
-
B.
Chebeague Island, Maine
Chebeague Island, Maine is a small island community in Casco Bay known for its coastal scenery, historic fishing and lobstering heritage, and role as a seasonal and year-round residential destination.
-
C.
Swan’s Island, Maine
Swan’s Island, Maine is a small, remote island community off the coast of Hancock County known for its fishing heritage, quiet natural beauty, and reliance on ferry access to the mainland.
-
D.
Indian Island, Maine
Indian Island, Maine is the primary reservation and community center of the Penobscot Nation, located in the Penobscot River in central Maine.
-
E.
Casco Bay islands
The Casco Bay islands are a scenic group of islands off the coast of Portland, Maine, known for their rugged shorelines, lighthouses, and recreational boating and fishing opportunities.
- 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: House Island (Casco Bay) Target entity description: House Island (Casco Bay) is a small privately owned island in Portland Harbor, Maine, historically known for its coastal fortifications and use as an immigration quarantine station.
-
A.
Westport Island, Maine
Westport Island, Maine is a small coastal town situated on an island in Lincoln County known for its scenic waterfront, rural character, and maritime heritage.
-
B.
Chebeague Island, Maine
Chebeague Island, Maine is a small island community in Casco Bay known for its coastal scenery, historic fishing and lobstering heritage, and role as a seasonal and year-round residential destination.
-
C.
Swan’s Island, Maine
Swan’s Island, Maine is a small, remote island community off the coast of Hancock County known for its fishing heritage, quiet natural beauty, and reliance on ferry access to the mainland.
-
D.
Indian Island, Maine
Indian Island, Maine is the primary reservation and community center of the Penobscot Nation, located in the Penobscot River in central Maine.
-
E.
Casco Bay islands
The Casco Bay islands are a scenic group of islands off the coast of Portland, Maine, known for their rugged shorelines, lighthouses, and recreational boating and fishing opportunities.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf | island ⓘ |
| administeredBy | City of Portland (jurisdiction) NERFINISHED ⓘ |
| bodyOfWater | Atlantic Ocean NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| hasAccess | boat only ⓘ |
| hasAlternativeName | House Island, Portland Harbor NERFINISHED ⓘ |
| hasArea | approximately 12 acres ⓘ |
| hasFeature |
historic military structures
ⓘ
rocky shoreline ⓘ wooded interior ⓘ |
| hasFortification | Fort Scammel NERFINISHED ⓘ |
| hasFortificationType | coastal fort ⓘ |
| hasHarbor | Portland Harbor NERFINISHED ⓘ |
| hasHistoricalFunction |
military defense site
ⓘ
quarantine station for immigrants ⓘ |
| hasHistoricalPeriod |
19th century coastal defense
ⓘ
early 20th century immigration quarantine ⓘ |
| hasHistoricSignificance |
part of U.S. coastal defense system
ⓘ
regional immigration processing site ⓘ |
| hasHistoricUse |
inspection of arriving immigrants
ⓘ
quarantine of arriving immigrants ⓘ |
| hasMilitaryAssociation | United States Army NERFINISHED ⓘ |
| hasName | House Island NERFINISHED ⓘ |
| hasNearbyIsland |
Cushing Island
NERFINISHED
ⓘ
Great Diamond Island NERFINISHED ⓘ Little Diamond Island NERFINISHED ⓘ Peaks Island NERFINISHED ⓘ |
| hasStructure | Fort Scammel NERFINISHED ⓘ |
| hasUse |
immigration quarantine station
ⓘ
site of coastal fortifications ⓘ |
| hasViewOf |
Portland Head Light
NERFINISHED
ⓘ
Portland skyline ⓘ |
| locatedIn |
Casco Bay
NERFINISHED
ⓘ
Cumberland County, Maine NERFINISHED ⓘ Maine NERFINISHED ⓘ Portland Harbor NERFINISHED ⓘ Portland, Maine NERFINISHED ⓘ United States of America ⓘ
surface form:
United States
|
| nearbyCity | Portland, Maine NERFINISHED ⓘ |
| ownershipStatus | privately owned ⓘ |
| partOf |
Casco Bay islands
NERFINISHED
ⓘ
defenses of Portland Harbor ⓘ |
| region | New England NERFINISHED ⓘ |
| usedFor |
private residences
ⓘ
tourism ⓘ |
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: House Island (Casco Bay) Description of subject: House Island (Casco Bay) is a small privately owned island in Portland Harbor, Maine, historically known for its coastal fortifications and use as an immigration quarantine station.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.