Blue Line
E767133
The Blue Line is a light rail service operated by Cleveland's Greater Cleveland Regional Transit Authority (RTA) as part of its urban transit network.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Blue Line canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T8830302 — 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: Blue Line Context triple: [RTA Rail, hasService, Blue Line]
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A.
Blue Line
The Blue Line is one of the color-coded rapid transit routes in the Washington Metro system, running through key parts of Washington, D.C. and its Virginia suburbs.
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B.
Blue Line
The Blue Line is one of the primary heavy-rail transit routes in Atlanta’s MARTA system, running east–west across the metropolitan area and serving key urban and suburban stations.
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C.
Blue Line
The Blue Line is one of the primary routes of the MetroLink light rail system serving the St. Louis metropolitan area.
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D.
Blue Line
The Blue Line is one of the main rapid transit corridors of the Hyderabad Metro system in Hyderabad, India.
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E.
Blue Line
The Blue Line is one of the aerial cable car routes in La Paz–El Alto’s Mi Teleférico urban transit system, providing high-altitude public transportation across the Bolivian cities.
- 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: Blue Line Target entity description: The Blue Line is a light rail service operated by Cleveland's Greater Cleveland Regional Transit Authority (RTA) as part of its urban transit network.
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A.
Blue Line
Blue Line is a light rail service route within Salt Lake City’s TRAX public transit system, connecting key areas of the metropolitan region.
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B.
Blue Line
The Blue Line is a light rail service operated by Sacramento Regional Transit that runs through key corridors of the Sacramento metropolitan area.
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C.
Blue Line
The Blue Line is a primary route of the Baltimore Light Rail system that provides north–south rail transit service through the Baltimore metropolitan area.
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D.
Blue Line
The Blue Line is one of the primary light rail transit routes in Calgary's CTrain system, serving key corridors across the city.
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E.
Blue Line
The Blue Line is a light rail route in the Dallas Area Rapid Transit (DART) system serving key neighborhoods and suburbs in the Dallas–Fort Worth metroplex.
- F. None of above. chosen
Statements (35)
| Predicate | Object |
|---|---|
| instanceOf |
light rail line
ⓘ
public transit service ⓘ |
| colorDesignation | blue ⓘ |
| connectsWith |
Green Line (RTA Rapid Transit)
NERFINISHED
ⓘ
RTA HealthLine NERFINISHED ⓘ Red Line (RTA Rapid Transit) NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | overhead line ⓘ |
| fareSystem | RTA fare system ⓘ |
| hasPredecessor | Cleveland Railway Shaker Heights line NERFINISHED ⓘ |
| hasStation |
East 55th station
NERFINISHED
ⓘ
Shaker Square station NERFINISHED ⓘ Tower City station NERFINISHED ⓘ Warrensville–Van Aken station NERFINISHED ⓘ |
| hasWebsite | https://www.riderta.com ⓘ |
| isBrandedAs | Blue Line NERFINISHED ⓘ |
| locatedIn |
Cleveland
NERFINISHED
ⓘ
Cuyahoga County NERFINISHED ⓘ Ohio ⓘ United States of America ⓘ
surface form:
United States
|
| openedAsCurrentService | 1980 ⓘ |
| operator | Greater Cleveland Regional Transit Authority NERFINISHED ⓘ |
| owner | Greater Cleveland Regional Transit Authority NERFINISHED ⓘ |
| partOf |
Greater Cleveland RTA rail network
NERFINISHED
ⓘ
RTA Rapid Transit NERFINISHED ⓘ |
| primaryCorridor | Van Aken Boulevard NERFINISHED ⓘ |
| railGauge | standard gauge ⓘ |
| serves |
Downtown Cleveland
NERFINISHED
ⓘ
Shaker Heights NERFINISHED ⓘ |
| servicePattern | urban light rail ⓘ |
| sharesTrackageWith | Green Line (RTA Rapid Transit) NERFINISHED ⓘ |
| systemType | light rail ⓘ |
| terminus |
Tower City station
NERFINISHED
ⓘ
Warrensville–Van Aken station NERFINISHED ⓘ |
| usesRollingStockType | light rail vehicles ⓘ |
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: Blue Line Description of subject: The Blue Line is a light rail service operated by Cleveland's Greater Cleveland Regional Transit Authority (RTA) as part of its urban transit network.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.