PJC (Amtrak)
E533632
PJC (Amtrak) is the Amtrak station code for Princeton Junction station in New Jersey, a key stop on the Northeast Corridor rail line.
All labels observed (1)
| Label | Occurrences |
|---|---|
| PJC (Amtrak) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5600105 — 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: PJC (Amtrak) Context triple: [Princeton Junction, hasStationCode, PJC (Amtrak)]
-
A.
SJC (Amtrak)
SJC (Amtrak) is the Amtrak station code for San Jose Diridon, a major passenger rail hub in San Jose, California.
-
B.
Amtrak
Amtrak is the United States’ national passenger railroad service, operating intercity and long-distance trains across much of the country.
-
C.
Amtrak Keystone Service
Amtrak Keystone Service is a passenger rail service operated by Amtrak that runs primarily between New York City and Harrisburg, Pennsylvania, providing frequent regional connections along the Keystone Corridor.
-
D.
Amtrak Piedmont
Amtrak Piedmont is a state-supported passenger train service in North Carolina that operates between Raleigh and Charlotte, connecting several cities along the Piedmont corridor.
-
E.
Amtrak Downeaster
Amtrak Downeaster is a passenger rail service operated by Amtrak that connects Boston with several communities in Maine and New Hampshire.
- 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: PJC (Amtrak) Target entity description: PJC (Amtrak) is the Amtrak station code for Princeton Junction station in New Jersey, a key stop on the Northeast Corridor rail line.
-
A.
SJC (Amtrak)
SJC (Amtrak) is the Amtrak station code for San Jose Diridon, a major passenger rail hub in San Jose, California.
-
B.
Amtrak
Amtrak is the United States’ national passenger railroad service, operating intercity and long-distance trains across much of the country.
-
C.
Amtrak Keystone Service
Amtrak Keystone Service is a passenger rail service operated by Amtrak that runs primarily between New York City and Harrisburg, Pennsylvania, providing frequent regional connections along the Keystone Corridor.
-
D.
Amtrak Piedmont
Amtrak Piedmont is a state-supported passenger train service in North Carolina that operates between Raleigh and Charlotte, connecting several cities along the Piedmont corridor.
-
E.
Amtrak Downeaster
Amtrak Downeaster is a passenger rail service operated by Amtrak that connects Boston with several communities in Maine and New Hampshire.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
Amtrak station code
ⓘ
railway station code ⓘ |
| associatedWith | New Jersey Transit Princeton Junction station ⓘ |
| codeType | three-letter station code ⓘ |
| corridor |
Boston–Washington Northeast Corridor
ⓘ
linked to:
Northeast Corridor
|
| corridorRole | key stop on the Northeast Corridor ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| identifies |
Princeton Junction station on Amtrak network
ⓘ
linked to:
Princeton Junction
|
| locatedIn |
Princeton Junction station
ⓘ
linked to:
Princeton Junction
|
| namingConvention | Amtrak three-letter station code system ⓘ |
| network | Amtrak national rail network ⓘ |
| operator | Amtrak ⓘ |
| primaryFunction | identify Princeton Junction in Amtrak systems ⓘ |
| railLine | Northeast Corridor ⓘ |
| refersTo |
Princeton Junction station
ⓘ
linked to:
Princeton Junction
|
| servesCity |
West Windsor Township, New Jersey
ⓘ
linked to:
West Windsor Township
|
| servesRegion | Central New Jersey ⓘ |
| serviceCategory |
intercity rail
ⓘ
regional rail ⓘ |
| state |
New Jersey
ⓘ
linked to:
New Jersey, United States
|
| transportMode | rail ⓘ |
| usedBy |
Amtrak reservation system
ⓘ
Amtrak ticketing ⓘ Amtrak timetables ⓘ |
| usedFor | intercity passenger rail services ⓘ |
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: PJC (Amtrak) Description of subject: PJC (Amtrak) is the Amtrak station code for Princeton Junction station in New Jersey, a key stop on the Northeast Corridor rail line.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.