Marcus Island
E690428
Marcus Island is a small, isolated Japanese coral atoll in the northwestern Pacific Ocean, notable as Japan’s easternmost territory and a strategic weather and navigation outpost.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Marcus Island canonical | 1 |
| Marcus Island region | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7039389 — 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: Marcus Island Context triple: [Minamitorishima, alsoKnownAs, Marcus Island]
-
A.
Gunther Island
Gunther Island is a small island located within Humboldt Bay on the northern coast of California, known for its ecological significance and cultural importance to local Indigenous peoples.
-
B.
Marsh Island
Marsh Island is a small, marshy island in Seattle’s Lake Washington, known for its wetlands and bird habitat along the Arboretum Waterfront Trail.
-
C.
Marsh Island
Marsh Island is a river island in the Penobscot River in Maine that hosts the town of Orono and the main campus of the University of Maine.
-
D.
Moore’s Island
Moore’s Island is a small, sparsely populated island and district in the Bahamas known for its close-knit community and fishing-based local economy.
-
E.
Denton Island
Denton Island is a major motorway interchange in Greater Manchester, England, connecting key routes including the M60 and A57 around the town of Denton.
- 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: Marcus Island Target entity description: Marcus Island is a small, isolated Japanese coral atoll in the northwestern Pacific Ocean, notable as Japan’s easternmost territory and a strategic weather and navigation outpost.
-
A.
Gunther Island
Gunther Island is a small island located within Humboldt Bay on the northern coast of California, known for its ecological significance and cultural importance to local Indigenous peoples.
-
B.
Marsh Island
Marsh Island is a small, marshy island in Seattle’s Lake Washington, known for its wetlands and bird habitat along the Arboretum Waterfront Trail.
-
C.
Marsh Island
Marsh Island is a river island in the Penobscot River in Maine that hosts the town of Orono and the main campus of the University of Maine.
-
D.
Moore’s Island
Moore’s Island is a small, sparsely populated island and district in the Bahamas known for its close-knit community and fishing-based local economy.
-
E.
Denton Island
Denton Island is a major motorway interchange in Greater Manchester, England, connecting key routes including the M60 and A57 around the town of Denton.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Japanese island
ⓘ
coral atoll ⓘ |
| administeredAsPartOf |
Ogasawara Subprefecture
NERFINISHED
ⓘ
Ogasawara Village NERFINISHED ⓘ |
| administeredBy | Tokyo Metropolis NERFINISHED ⓘ |
| area | 1.2 square kilometres ⓘ |
| climate | tropical ⓘ |
| controlledByDuringWorldWarII | Japan NERFINISHED ⓘ |
| country | Japan ⓘ |
| discoveredBy | Andrew Marcus NERFINISHED ⓘ |
| discoveryYear | 1855 ⓘ |
| distanceFromTokyo | over 1800 kilometres southeast of Tokyo ⓘ |
| easternmostPointOf | Japan NERFINISHED ⓘ |
| elevation | about 9 metres ⓘ |
| exclusiveEconomicZoneExtent | large EEZ around the island ⓘ |
| formerName | Marcus Island NERFINISHED ⓘ |
| geology | raised coral platform ⓘ |
| hasFacility | Japan Meteorological Agency station ⓘ |
| hasNo | natural freshwater sources ⓘ |
| hasRunway | short airstrip ⓘ |
| importantFor | Japan’s EEZ claims in the Pacific ⓘ |
| inhabitedBy | rotating teams of personnel only ⓘ |
| islandType | coral atoll ⓘ |
| JapaneseName | Minami-Tori-shima NERFINISHED ⓘ |
| locatedIn |
Philippine Sea
NERFINISHED
ⓘ
northwestern Pacific Ocean NERFINISHED ⓘ |
| meaningOfJapaneseName | "Southern Bird Island" NERFINISHED ⓘ |
| namedAfter | Andrew Marcus NERFINISHED ⓘ |
| occupiedByAfterWorldWarII | United States NERFINISHED ⓘ |
| partOf | Ogasawara Islands NERFINISHED ⓘ |
| permanentCivilianPopulation | no ⓘ |
| population | uninhabited ⓘ |
| region | Micronesia (geographical region) NERFINISHED ⓘ |
| returnedTo | Japan NERFINISHED ⓘ |
| returnYearToJapan | 1968 ⓘ |
| romanizedJapaneseName | Minamitorishima NERFINISHED ⓘ |
| sovereignState | Japan NERFINISHED ⓘ |
| strategicImportance |
maritime navigation
ⓘ
meteorological observation ⓘ |
| surroundedBy | coral reef ⓘ |
| timezone | UTC+9 ⓘ |
| usedAs |
navigation outpost
ⓘ
weather observation station ⓘ |
| usedBy |
Japan Maritime Self-Defense Force
NERFINISHED
ⓘ
Japan Meteorological Agency NERFINISHED ⓘ |
| usedDuring | World War II ⓘ |
| vegetation | sparse grasses and shrubs ⓘ |
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: Marcus Island Description of subject: Marcus Island is a small, isolated Japanese coral atoll in the northwestern Pacific Ocean, notable as Japan’s easternmost territory and a strategic weather and navigation outpost.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Marcus Island region