ACE
E7290
ACE (Altamont Corridor Express) is a commuter rail service in California’s San Joaquin Valley and East Bay that provides weekday trains between Stockton and San Jose.
All labels observed (3)
| Label | Occurrences |
|---|---|
| ACE canonical | 4 |
| ACE network | 1 |
| SJD (ACE) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T76659 — 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: ACE Context triple: [Caltrain, connectsWith, ACE]
-
A.
ATE
ATE is a U.S. National Science Foundation program that supports the education and training of technicians for advanced technology fields through partnerships between two-year colleges, industry, and other educational institutions.
-
B.
ARC
ARC is the commonly used acronym for the Augmentation Research Center, a pioneering research group known for its early work on interactive computing and human–computer interaction.
-
C.
ABC
ABC is a major American broadcast television network known for airing a wide range of national programming, including sports championships, news, and entertainment shows.
-
D.
ABA
The ABA (American Basketball Association) was a professional basketball league that operated in the United States from 1967 to 1976 and later merged with the NBA, known for its flashy style, three-point line, and red-white-and-blue basketball.
-
E.
AA
AA is the two-letter IATA airline designator used to identify American Airlines in flight schedules, tickets, and aviation systems.
- 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: ACE Target entity description: ACE (Altamont Corridor Express) is a commuter rail service in California’s San Joaquin Valley and East Bay that provides weekday trains between Stockton and San Jose.
-
A.
ATE
ATE is a U.S. National Science Foundation program that supports the education and training of technicians for advanced technology fields through partnerships between two-year colleges, industry, and other educational institutions.
-
B.
ARC
ARC is the commonly used acronym for the Augmentation Research Center, a pioneering research group known for its early work on interactive computing and human–computer interaction.
-
C.
ABC
ABC is a major American broadcast television network known for airing a wide range of national programming, including sports championships, news, and entertainment shows.
-
D.
ABA
The ABA (American Basketball Association) was a professional basketball league that operated in the United States from 1967 to 1976 and later merged with the NBA, known for its flashy style, three-point line, and red-white-and-blue basketball.
-
E.
AA
AA is the two-letter IATA airline designator used to identify American Airlines in flight schedules, tickets, and aviation systems.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail service
ⓘ
passenger rail service ⓘ public transportation system ⓘ |
| abbreviation | ACE self-linksurface differs ⓘ |
| category |
Commuter rail in California
ⓘ
Passenger rail transportation in the San Francisco Bay Area ⓘ Public transportation in San Joaquin County, California ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| endPoint |
San Jose
ⓘ
surface form:
San Jose, California
|
| hasAcronym | ACE self-linksurface differs ⓘ |
| modeOfTransport | rail ⓘ |
| operatesIn |
California, United States
ⓘ
surface form:
California
East Bay ⓘ Central Valley ⓘ
surface form:
San Joaquin Valley
|
| operator | San Joaquin Regional Rail Commission ⓘ |
| passesThrough | Altamont Pass ⓘ |
| primaryRoute |
Stockton
ⓘ
surface form:
Stockton–San Jose
|
| railLineName |
Altamont Pass
ⓘ
surface form:
Altamont Corridor
|
| regionServed | Northern California ⓘ |
| serviceArea |
Alameda County
ⓘ
San Joaquin County ⓘ Santa Clara County ⓘ |
| servicePattern | weekday only ⓘ |
| serviceType | weekday commuter rail ⓘ |
| startPoint |
Stockton
ⓘ
surface form:
Stockton, California
|
| terminus |
San Jose
ⓘ
Stockton ⓘ |
| trackGauge | standard gauge ⓘ |
| usesRailInfrastructureOf | Union Pacific Railroad ⓘ |
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: ACE Description of subject: ACE (Altamont Corridor Express) is a commuter rail service in California’s San Joaquin Valley and East Bay that provides weekday trains between Stockton and San Jose.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Altamont Corridor Express
subject surface form:
Altamont Corridor Express
this entity surface form:
SJD (ACE)
this entity surface form:
ACE network