Great Diamond Island
E232600
Great Diamond Island is a small, largely residential island in Casco Bay, Maine, known for its historic military installations and seasonal vacation community.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Great Diamond Island canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T1478532 — 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: Great Diamond Island Context triple: [Casco Bay, containsIsland, Great Diamond Island]
-
A.
Middle Island
Middle Island is one of the small, remote islands in the Tristan da Cunha archipelago in the South Atlantic Ocean.
-
B.
Great Island
Great Island is a large, mostly undeveloped barrier peninsula and hiking area within the Cape Cod National Seashore in Wellfleet, Massachusetts, known for its beaches, salt marshes, and scenic trails.
-
C.
Cathedral Island
Cathedral Island is the historic oldest part of Wrocław, known for its Gothic churches, picturesque riverside setting, and preserved medieval architecture.
-
D.
Fremont Island
Fremont Island is a largely uninhabited, privately owned island in Utah’s Great Salt Lake, known for its rugged terrain, historical ranching use, and limited public access.
-
E.
Moon Island
Moon Island is a small, historically significant island in Boston Harbor that has served various municipal and military uses, including as a training site and former sewage treatment facility.
- 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: Great Diamond Island Target entity description: Great Diamond Island is a small, largely residential island in Casco Bay, Maine, known for its historic military installations and seasonal vacation community.
-
A.
Middle Island
Middle Island is one of the small, remote islands in the Tristan da Cunha archipelago in the South Atlantic Ocean.
-
B.
Great Island
Great Island is a large, mostly undeveloped barrier peninsula and hiking area within the Cape Cod National Seashore in Wellfleet, Massachusetts, known for its beaches, salt marshes, and scenic trails.
-
C.
Cathedral Island
Cathedral Island is the historic oldest part of Wrocław, known for its Gothic churches, picturesque riverside setting, and preserved medieval architecture.
-
D.
Fremont Island
Fremont Island is a largely uninhabited, privately owned island in Utah’s Great Salt Lake, known for its rugged terrain, historical ranching use, and limited public access.
-
E.
Moon Island
Moon Island is a small, historically significant island in Boston Harbor that has served various municipal and military uses, including as a training site and former sewage treatment facility.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
island
ⓘ
populated place ⓘ |
| access |
passenger ferry from Portland
ⓘ
private boat ⓘ |
| archipelago | Calendar Islands ⓘ |
| bodyOfWater | Atlantic Ocean ⓘ |
| climate | humid continental climate ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county | Cumberland County, Maine ⓘ |
| developedFrom | former military base housing ⓘ |
| formerFunction | coastal artillery post ⓘ |
| fortificationName |
Fort McKinley
ⓘ
surface form:
Fort McKinley Historic District
|
| hasAmenity |
inn
ⓘ
marina ⓘ restaurant ⓘ |
| hasStructure |
former barracks buildings
ⓘ
former batteries and gun emplacements ⓘ former officers quarters ⓘ |
| historicSite | Fort McKinley ⓘ |
| knownFor |
historic military installations
ⓘ
summer cottages ⓘ waterfront views ⓘ |
| locatedIn |
Casco Bay
ⓘ
Gulf of Maine ⓘ Maine ⓘ United States of America ⓘ
surface form:
United States
|
| militaryEra | Endicott Period coastal fortification ⓘ |
| militaryUse | former U.S. Army coastal defense post ⓘ |
| neighboringIsland |
Little Diamond Island
ⓘ
Long Island, Maine ⓘ
surface form:
Long Island (Maine)
Peaks Island ⓘ |
| partOf |
Portland, Maine
ⓘ
surface form:
City of Portland, Maine
Portland neighborhood islands ⓘ |
| populationCharacteristic |
largely seasonal residents
ⓘ
small year-round population ⓘ |
| recreation |
boating
ⓘ
fishing ⓘ kayaking ⓘ walking and biking ⓘ |
| region | New England ⓘ |
| state | Maine ⓘ |
| timezone | Eastern Time Zone ⓘ |
| tourism | seasonal tourism destination ⓘ |
| transportOperator | Casco Bay Lines ⓘ |
| use |
residential community
ⓘ
seasonal vacation community ⓘ |
| vehiclePolicy | limited automobile use ⓘ |
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: Great Diamond Island Description of subject: Great Diamond Island is a small, largely residential island in Casco Bay, Maine, known for its historic military installations and seasonal vacation community.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Portland Harbor