JS21
E536020
JS21 is the station code assigned to Ikebukuro Station on Japan’s JR rail network.
All labels observed (1)
| Label | Occurrences |
|---|---|
| JS21 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5553168 — 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: JS21 Context triple: [Ikebukuro Station, hasStationCode, JS21]
-
A.
JS17
JS17 is the station code assigned to Osaki Station on Japan's railway network.
-
B.
JES2
JES2 (Job Entry Subsystem 2) is an IBM mainframe component that manages the input, scheduling, and output of batch jobs and print workloads in the z/OS operating system.
-
C.
JS Kaga
JS Kaga is a Japanese Maritime Self-Defense Force warship, the second vessel of the Izumo-class designed primarily for anti-submarine warfare and helicopter operations.
-
D.
JST
JST is the time zone used throughout Japan, nine hours ahead of Coordinated Universal Time (UTC+9).
-
E.
JST
JST is the ICAO airline designator used to identify Jetstar Airways in international aviation operations.
- 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: JS21 Target entity description: JS21 is the station code assigned to Ikebukuro Station on Japan’s JR rail network.
-
A.
JS17
JS17 is the station code assigned to Osaki Station on Japan's railway network.
-
B.
JES2
JES2 (Job Entry Subsystem 2) is an IBM mainframe component that manages the input, scheduling, and output of batch jobs and print workloads in the z/OS operating system.
-
C.
JS Kaga
JS Kaga is a Japanese Maritime Self-Defense Force warship, the second vessel of the Izumo-class designed primarily for anti-submarine warfare and helicopter operations.
-
D.
JST
JST is the ICAO airline designator used to identify Jetstar Airways in international aviation operations.
-
E.
JST
JST is the time zone used throughout Japan, nine hours ahead of Coordinated Universal Time (UTC+9).
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
JR East station code
ⓘ
railway station code ⓘ |
| appliesToLine |
Kawagoe Line through services
ⓘ
Rinkai Line through services ⓘ Saikyo Line ⓘ
linked to:
Saikyō Line
|
| appliesToServiceType | commuter rail ⓘ |
| appliesToStation | Ikebukuro Station ⓘ |
| associatedLanguage | Japanese ⓘ |
| associatedScript |
Arabic numerals
ⓘ
Latin alphabet ⓘ |
| codeFormat | alphanumeric ⓘ |
| codeNumber | 21 ⓘ |
| codePrefix | JS ⓘ |
| country | Japan ⓘ |
| fareSystem | JR East fare system ⓘ |
| identifiesStationWithinLine |
Saikyo Line
ⓘ
linked to:
Saikyō Line
|
| introducedBy |
JR East
ⓘ
linked to:
East Japan Railway Company
|
| isUniqueWithinLine | yes ⓘ |
| locatedInCity | Tokyo ⓘ |
| locatedInWard | Toshima ⓘ |
| railwayNetwork | JR East network ⓘ |
| railwayOperator |
East Japan Railway Company
ⓘ
JR East ⓘ
linked to:
East Japan Railway Company
|
| region |
Kanto region
ⓘ
linked to:
Kantō region
|
| stationNumberingSystem | JR East station numbering ⓘ |
| transportMode | rail ⓘ |
| usedByForeignTourists | yes ⓘ |
| usedForPassengerInformation | yes ⓘ |
| usedOnRouteMaps | yes ⓘ |
| usedOnSignage | yes ⓘ |
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: JS21 Description of subject: JS21 is the station code assigned to Ikebukuro Station on Japan’s JR rail network.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.