United States Capitol Subway System
E541364
The United States Capitol Subway System is a small network of underground rail lines that transports members of Congress and staff between the Capitol and nearby congressional office buildings in Washington, D.C.
All labels observed (1)
| Label | Occurrences |
|---|---|
| United States Capitol Subway System canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5722559 — 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: United States Capitol Subway System Context triple: [House of Representatives office buildings, connectedTo, United States Capitol Subway System]
-
A.
Washington Metro
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.
-
B.
Roosevelt Island Tramway
The Roosevelt Island Tramway is an aerial cable car system in New York City that connects Roosevelt Island to Manhattan, offering both public transit and scenic views of the skyline.
-
C.
Union Station (Washington Metro)
Union Station is a major Washington Metro station in Washington, D.C., serving as a key transit hub connected to the historic Union Station rail terminal and multiple local and regional transportation services.
-
D.
Smithsonian Metro station
Smithsonian Metro station is a Washington, D.C. Metrorail stop on the National Mall that serves major museums and monuments including the Smithsonian Institution.
-
E.
Metrorail
Metrorail is the rapid transit system serving the Washington, D.C. metropolitan area, operated by the Washington Metropolitan Area Transit Authority (WMATA).
- 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: United States Capitol Subway System Target entity description: The United States Capitol Subway System is a small network of underground rail lines that transports members of Congress and staff between the Capitol and nearby congressional office buildings in Washington, D.C.
-
A.
Washington Metro
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.
-
B.
Roosevelt Island Tramway
The Roosevelt Island Tramway is an aerial cable car system in New York City that connects Roosevelt Island to Manhattan, offering both public transit and scenic views of the skyline.
-
C.
Union Station (Washington Metro)
Union Station is a major Washington Metro station in Washington, D.C., serving as a key transit hub connected to the historic Union Station rail terminal and multiple local and regional transportation services.
-
D.
Smithsonian Metro station
Smithsonian Metro station is a Washington, D.C. Metrorail stop on the National Mall that serves major museums and monuments including the Smithsonian Institution.
-
E.
Metrorail
Metrorail is the rapid transit system serving the Washington, D.C. metropolitan area, operated by the Washington Metropolitan Area Transit Authority (WMATA).
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
intra-campus rail transit system
ⓘ
underground people mover system ⓘ |
| accessPolicy | primarily restricted to congressional use ⓘ |
| cityServed | Washington, D.C. NERFINISHED ⓘ |
| connects |
Cannon House Office Building
NERFINISHED
ⓘ
Dirksen Senate Office Building NERFINISHED ⓘ Hart Senate Office Building NERFINISHED ⓘ Longworth House Office Building NERFINISHED ⓘ Rayburn House Office Building NERFINISHED ⓘ Russell Senate Office Building NERFINISHED ⓘ United States Capitol NERFINISHED ⓘ |
| country | United States of America ⓘ |
| fareSystem | free of charge ⓘ |
| hasFeature |
dedicated tunnels between buildings
ⓘ
short-distance shuttle operations ⓘ |
| hasInfrastructureType |
station platforms
ⓘ
tunnel ⓘ |
| hasLine |
House Subway
NERFINISHED
ⓘ
Senate Subway NERFINISHED ⓘ |
| hasRollingStockType |
automated small trains
ⓘ
open-air electric cars ⓘ |
| hasSection |
House open car shuttle between Capitol and Rayburn
ⓘ
Senate automated train between Hart and Dirksen ⓘ Senate open car shuttle between Capitol and Russell ⓘ |
| isUnderground | true ⓘ |
| locatedIn | United States Capitol Complex NERFINISHED ⓘ |
| location | Washington, D.C. ⓘ |
| notPublicTransit | true ⓘ |
| opened | 1909 ⓘ |
| operator | Architect of the Capitol NERFINISHED ⓘ |
| owner |
United States government
ⓘ
surface form:
United States federal government
|
| partOf | infrastructure of the United States Capitol Complex ⓘ |
| primaryUsers |
congressional staff
ⓘ
members of the United States Congress ⓘ |
| propulsion | electric ⓘ |
| purpose |
transportation of congressional staff
ⓘ
transportation of legislators ⓘ |
| region | Capitol Hill NERFINISHED ⓘ |
| safetyFeature | escort requirements for visitors ⓘ |
| securityJurisdiction | United States Capitol Police NERFINISHED ⓘ |
| serves |
House office buildings
ⓘ
Senate office buildings ⓘ United States Capitol NERFINISHED ⓘ |
| trackGauge | narrow-gauge ⓘ |
| usedBy |
United States Representatives
NERFINISHED
ⓘ
United States Senators NERFINISHED ⓘ authorized visitors ⓘ |
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: United States Capitol Subway System Description of subject: The United States Capitol Subway System is a small network of underground rail lines that transports members of Congress and staff between the Capitol and nearby congressional office buildings in Washington, D.C.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.