Green Line (CTA) main line
E521596
The Green Line (CTA) main line is a principal rapid transit route in Chicago’s 'L' system, running primarily along the South and West Sides and serving as a core corridor that branches to multiple termini.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Green Line (CTA) main line canonical | 1 |
| Green Line Lake–Englewood/Jackson Park service | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4414605 — 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: Green Line (CTA) main line Context triple: [Ashland/63rd Branch, connectsWith, Green Line (CTA) main line]
-
A.
Yellow Line (CTA)
The Yellow Line (CTA), also known as the Skokie Swift, is a short Chicago Transit Authority rapid transit route that runs between Howard and Skokie without serving downtown Chicago.
-
B.
Purple Line (CTA)
The Purple Line (CTA) is a rapid transit route in Chicago primarily serving the northern suburbs and Evanston, with express service to downtown during weekday rush hours.
-
C.
Fourth Avenue Line
The Fourth Avenue Line is a major New York City Subway trunk line in Brooklyn that carries several services, including the N train, along a north–south corridor.
-
D.
Red Line (Chicago "L")
The Red Line is a major rapid transit route of the Chicago "L" system, running north–south through the city and operating 24 hours a day.
-
E.
Sixth Avenue Line
The Sixth Avenue Line is a major New York City Subway trunk line in Manhattan that primarily carries B, D, F, and M trains along Sixth Avenue.
- 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: Green Line (CTA) main line Target entity description: The Green Line (CTA) main line is a principal rapid transit route in Chicago’s 'L' system, running primarily along the South and West Sides and serving as a core corridor that branches to multiple termini.
-
A.
Yellow Line (CTA)
The Yellow Line (CTA), also known as the Skokie Swift, is a short Chicago Transit Authority rapid transit route that runs between Howard and Skokie without serving downtown Chicago.
-
B.
Purple Line (CTA)
The Purple Line (CTA) is a rapid transit route in Chicago primarily serving the northern suburbs and Evanston, with express service to downtown during weekday rush hours.
-
C.
Fourth Avenue Line
The Fourth Avenue Line is a major New York City Subway trunk line in Brooklyn that carries several services, including the N train, along a north–south corridor.
-
D.
Red Line (Chicago "L")
The Red Line is a major rapid transit route of the Chicago "L" system, running north–south through the city and operating 24 hours a day.
-
E.
Sixth Avenue Line
The Sixth Avenue Line is a major New York City Subway trunk line in Manhattan that primarily carries B, D, F, and M trains along Sixth Avenue.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
public transport route
ⓘ
rapid transit line ⓘ |
| color | green ⓘ |
| connectsWith |
Blue Line (CTA)
NERFINISHED
ⓘ
Brown Line (CTA) NERFINISHED ⓘ Orange Line (CTA) NERFINISHED ⓘ Pink Line (CTA) NERFINISHED ⓘ Purple Line (CTA) NERFINISHED ⓘ Red Line (CTA) NERFINISHED ⓘ |
| electrification | third rail ⓘ |
| fareCollection | proof-of-payment at station turnstiles ⓘ |
| fareSystem | Ventra ⓘ |
| hasBranch |
Green Line (CTA) Ashland/63rd branch
NERFINISHED
ⓘ
Green Line (CTA) Cottage Grove branch NERFINISHED ⓘ Green Line (CTA) Harlem/Lake branch NERFINISHED ⓘ |
| hasFeature |
accessible stations
ⓘ
park-and-ride facilities at some stations ⓘ |
| hasServiceOperator | CTA rail operations division NERFINISHED ⓘ |
| hasTerminus |
Ashland/63rd station
NERFINISHED
ⓘ
Cottage Grove station NERFINISHED ⓘ Harlem/Lake station NERFINISHED ⓘ |
| isCoreCorridorFor | Green Line (CTA) branches NERFINISHED ⓘ |
| locatedIn |
Chicago, Illinois, United States
ⓘ
surface form:
Chicago
Illinois ⓘ United States of America ⓘ
surface form:
United States
|
| mode | rail ⓘ |
| operator | Chicago Transit Authority ⓘ |
| ownedBy | Chicago Transit Authority ⓘ |
| partOf | Chicago 'L' NERFINISHED ⓘ |
| passesThrough |
Englewood neighborhood
NERFINISHED
ⓘ
Garfield Park corridor NERFINISHED ⓘ Loop Elevated NERFINISHED ⓘ Woodlawn neighborhood NERFINISHED ⓘ |
| regionServed | Chicago metropolitan area NERFINISHED ⓘ |
| routeColorUsedOnMaps | green ⓘ |
| safetySystem | wayside signaling ⓘ |
| servesArea |
Chicago Loop
NERFINISHED
ⓘ
South Side of Chicago NERFINISHED ⓘ West Side of Chicago NERFINISHED ⓘ |
| servicePattern | all-day service ⓘ |
| system | Chicago Transit Authority rail system NERFINISHED ⓘ |
| trackGauge | standard gauge ⓘ |
| transitType | rapid transit ⓘ |
| usesInfrastructure |
at-grade railway
ⓘ
elevated railway ⓘ |
| usesRollingStock | electric multiple units ⓘ |
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: Green Line (CTA) main line Description of subject: The Green Line (CTA) main line is a principal rapid transit route in Chicago’s 'L' system, running primarily along the South and West Sides and serving as a core corridor that branches to multiple termini.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Green Line Lake–Englewood/Jackson Park service