51st station (Green Line)
E464323
51st station (Green Line) is a Chicago 'L' rapid transit station on the Green Line serving the Washington Park neighborhood on the South Side.
All labels observed (2)
| Label | Occurrences |
|---|---|
| 51st station (Green Line) canonical | 2 |
| 51st station (CTA Green Line) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4702310 — 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: 51st station (Green Line) Context triple: [47th station (Green Line), hasAdjacentStation, 51st station (Green Line)]
-
A.
47th station (Green Line)
47th station (Green Line) is an elevated Chicago Transit Authority rapid transit stop located in the Bronzeville neighborhood on the South Side of Chicago.
-
B.
43rd station (Green Line)
43rd station (Green Line) is a Chicago 'L' rapid transit station on the Green Line serving the Bronzeville neighborhood on the South Side of Chicago.
-
C.
Pulaski station (Green Line)
Pulaski station (Green Line) is an elevated Chicago 'L' rapid transit station on the CTA's Green Line located in the city's West Garfield Park neighborhood.
-
D.
Garfield station (Green Line)
Garfield station (Green Line) is an elevated Chicago 'L' rapid transit station located in the Washington Park neighborhood on the city's South Side.
-
E.
Washington Street station
Washington Street station is a stop on the Newark Light Rail system serving passengers in downtown Newark, New Jersey.
- 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: 51st station (Green Line) Target entity description: 51st station (Green Line) is a Chicago 'L' rapid transit station on the Green Line serving the Washington Park neighborhood on the South Side.
-
A.
47th station (Green Line)
47th station (Green Line) is an elevated Chicago Transit Authority rapid transit stop located in the Bronzeville neighborhood on the South Side of Chicago.
-
B.
43rd station (Green Line)
43rd station (Green Line) is a Chicago 'L' rapid transit station on the Green Line serving the Bronzeville neighborhood on the South Side of Chicago.
-
C.
Pulaski station (Green Line)
Pulaski station (Green Line) is an elevated Chicago 'L' rapid transit station on the CTA's Green Line located in the city's West Garfield Park neighborhood.
-
D.
Garfield station (Green Line)
Garfield station (Green Line) is an elevated Chicago 'L' rapid transit station located in the Washington Park neighborhood on the city's South Side.
-
E.
Washington Street station
Washington Street station is a stop on the Newark Light Rail system serving passengers in downtown Newark, New Jersey.
- F. None of above. chosen
Statements (28)
| Predicate | Object |
|---|---|
| instanceOf |
Chicago 'L' station
ⓘ
rapid transit station ⓘ |
| fareSystem | Ventra ⓘ |
| hasAccessibility | not fully accessible ⓘ |
| hasAddress | near East 51st Street and South Prairie Avenue, Chicago ⓘ |
| hasConnection | CTA bus services nearby ⓘ |
| hasDirectionServed |
northbound
ⓘ
southbound ⓘ |
| hasFareControl | station house at street level ⓘ |
| hasNumberOfPlatforms | 1 ⓘ |
| hasNumberOfTracks | 2 ⓘ |
| hasPlatformType | island platform ⓘ |
| hasServiceType | local service ⓘ |
| hasStructureType | elevated station ⓘ |
| hasZone | flat fare system (no zones) ⓘ |
| lineColor | green ⓘ |
| locatedIn |
Chicago, Illinois
ⓘ
linked to:
Chicago, Illinois, United States
Illinois ⓘ South Side, Chicago ⓘ United States ⓘ
linked to:
United States of America
Washington Park, Chicago ⓘ |
| opened | 1892 ⓘ |
| operatedBy | Chicago Transit Authority ⓘ |
| ownedBy | Chicago Transit Authority ⓘ |
| partOfSystem |
Chicago 'L'
ⓘ
linked to:
Chicago "L"
|
| rebuilt | 1994 ⓘ |
| servedByLine |
Green Line (CTA)
ⓘ
linked to:
CTA Green Line
|
| servesNeighborhood | Washington Park neighborhood ⓘ |
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: 51st station (Green Line) Description of subject: 51st station (Green Line) is a Chicago 'L' rapid transit station on the Green Line serving the Washington Park neighborhood on the South Side.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: 51st station (Green Line)