Blue Line (selected runs over time)
E437013
Blue Line (selected runs over time) refers to specific services on Chicago’s Blue Line rapid transit route that at certain periods have been operated with CTA 5000-series railcars.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Blue Line (selected runs over time) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4414651 — 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 (selected runs over time) Context triple: [CTA 5000-series railcars, usedOnLine, Blue Line (selected runs over time)]
-
A.
Blue line
The Blue line is one of the main lines of the Stockholm metro system, connecting central Stockholm with several northern and western suburbs.
-
B.
MAX Blue Line
MAX Blue Line is a light rail service in the Portland, Oregon metropolitan area that connects downtown Portland with eastern and western suburbs as part of the region’s MAX Light Rail system.
-
C.
Green line
The Green line is one of the main color-coded routes in the Stockholm metro system, serving numerous central and suburban stations across the city.
-
D.
Yellow Line
The Yellow Line is one of the primary passenger rail routes of the Tyne and Wear Metro rapid transit system serving the Newcastle upon Tyne area in North East England.
-
E.
Yellow Line
The Yellow Line is one of the color-coded rapid transit routes in the Washington Metro system, running primarily in a north–south direction and serving key areas in Washington, D.C. and Northern Virginia.
- 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 (selected runs over time) Target entity description: Blue Line (selected runs over time) refers to specific services on Chicago’s Blue Line rapid transit route that at certain periods have been operated with CTA 5000-series railcars.
-
A.
Blue line
The Blue line is one of the main lines of the Stockholm metro system, connecting central Stockholm with several northern and western suburbs.
-
B.
MAX Blue Line
MAX Blue Line is a light rail service in the Portland, Oregon metropolitan area that connects downtown Portland with eastern and western suburbs as part of the region’s MAX Light Rail system.
-
C.
Green line
The Green line is one of the main color-coded routes in the Stockholm metro system, serving numerous central and suburban stations across the city.
-
D.
Yellow Line
The Yellow Line is one of the primary passenger rail routes of the Tyne and Wear Metro rapid transit system serving the Newcastle upon Tyne area in North East England.
-
E.
Yellow Line
The Yellow Line is a designated route within the Baltimore Light Rail system that serves as one of its primary color-coded service lines.
- F. None of above. chosen
Statements (28)
| Predicate | Object |
|---|---|
| instanceOf |
Chicago Transit Authority service
ⓘ
public transit service pattern ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| electrification | third rail ⓘ |
| fareCollection | proof-of-payment at station turnstiles ⓘ |
| fareSystem | Ventra ⓘ |
| hasPlatformConfiguration | high-level platforms ⓘ |
| lineColor | blue ⓘ |
| locatedIn |
Chicago
ⓘ
linked to:
Chicago, Illinois, United States
Illinois ⓘ |
| network |
Chicago 'L' rapid transit system
ⓘ
linked to:
Chicago "L"
|
| operatedBy | Chicago Transit Authority ⓘ |
| operatesOn |
Blue Line Forest Park branch
ⓘ
linked to:
Forest Park branch
Blue Line O’Hare branch ⓘ
linked to:
O'Hare branch of the Blue Line
|
| operatorAbbreviation | CTA ⓘ |
| partOf |
Blue Line (CTA)
ⓘ
linked to:
CTA Blue Line
|
| rollingStockOwner | Chicago Transit Authority ⓘ |
| rollingStockSeries | 5000-series ⓘ |
| routeType | rapid transit ⓘ |
| safetySystem | wayside signaling ⓘ |
| serviceArea | Chicago metropolitan area ⓘ |
| serviceFrequencyCharacteristic | varies by schedule period ⓘ |
| servicePatternCharacteristic |
selected trips only
ⓘ
uses specific railcar series ⓘ |
| trackGauge | standard gauge ⓘ |
| transitMode | rail rapid transit ⓘ |
| usesPowerSupply | 600 V DC (approximate) third rail ⓘ |
| usesRollingStock |
CTA 5000-series railcar
ⓘ
linked to:
CTA 5000-series railcars
|
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 (selected runs over time) Description of subject: Blue Line (selected runs over time) refers to specific services on Chicago’s Blue Line rapid transit route that at certain periods have been operated with CTA 5000-series railcars.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.