Washington Metro
E225
Washington Metro is the rapid transit system serving the Washington, D.C. metropolitan area, known for its extensive rail network connecting the city with its suburbs in Maryland and Virginia.
All labels observed (28)
How this entity was disambiguated
This entity first appeared as the object of triple T1188 — 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: Washington Metro Context triple: [Washington, D.C., hasPublicTransitSystem, Washington Metro]
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A.
Arlington, Virginia
Arlington, Virginia is an urban county directly across the Potomac River from Washington, D.C., known for its dense development, federal government agencies, and landmarks such as the Pentagon and Arlington National Cemetery.
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B.
MBTA Fitchburg Line
The MBTA Fitchburg Line is a commuter rail route in the Greater Boston area that runs between Boston and Fitchburg, serving numerous suburban communities along the way.
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C.
Washington, D.C.
Washington, D.C. is the capital city of the United States, serving as the nation’s political center and home to its federal government institutions.
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D.
University City, Philadelphia
University City, Philadelphia is a vibrant West Philadelphia neighborhood known for its concentration of major universities, research institutions, and cultural venues.
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E.
Douglas
Douglas is a masculine given name of Scottish origin that has been widely used in English-speaking countries.
- 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: Washington Metro Target entity description: Washington Metro is the rapid transit system serving the Washington, D.C. metropolitan area, known for its extensive rail network connecting the city with its suburbs in Maryland and Virginia.
-
A.
Arlington, Virginia
Arlington, Virginia is an urban county directly across the Potomac River from Washington, D.C., known for its dense development, federal government agencies, and landmarks such as the Pentagon and Arlington National Cemetery.
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B.
MBTA Fitchburg Line
The MBTA Fitchburg Line is a commuter rail route in the Greater Boston area that runs between Boston and Fitchburg, serving numerous suburban communities along the way.
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C.
Washington, D.C.
Washington, D.C. is the capital city of the United States, serving as the nation’s political center and home to its federal government institutions.
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D.
Brooklyn Bridge
The Brooklyn Bridge is a historic 19th-century suspension bridge spanning the East River, renowned as an iconic symbol of New York City and a major connection between Manhattan and Brooklyn.
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E.
University City, Philadelphia
University City, Philadelphia is a vibrant West Philadelphia neighborhood known for its concentration of major universities, research institutions, and cultural venues.
- F. None of above. chosen
Statements (50)
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: Washington Metro Description of subject: Washington Metro is the rapid transit system serving the Washington, D.C. metropolitan area, known for its extensive rail network connecting the city with its suburbs in Maryland and Virginia.
Referenced by (247)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Washington Metro rail network
this entity surface form:
Washington Metro rail network
Baltimore–Washington metropolitan area transportation network
→
servedByTransitSystem
→
Washington Metro
ⓘ
subject surface form:
Washington Metro Silver Line
subject surface form:
Smithsonian station
this entity surface form:
Metrorail (Washington, D.C.)
subject surface form:
Arlington County
this entity surface form:
WMATA rail system
this entity surface form:
Metrorail (Washington Metro)