Capitol Corridor Joint Powers Authority
E70401
The Capitol Corridor Joint Powers Authority is a California-based public agency that oversees and manages Amtrak’s Capitol Corridor intercity passenger rail service between the Sacramento–San Francisco Bay Area region and surrounding communities.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Capitol Corridor Joint Powers Authority canonical | 7 |
| Capitol Corridor (nearby rail service) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T563367 — 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: Capitol Corridor Joint Powers Authority Context triple: [Amtrak Capitol Corridor, primaryOperator, Capitol Corridor Joint Powers Authority]
-
A.
Peninsula Corridor Joint Powers Board
The Peninsula Corridor Joint Powers Board is a public agency formed by Bay Area counties to oversee and manage the Caltrain commuter rail service along the San Francisco Peninsula.
-
B.
San Joaquin Regional Rail Commission
The San Joaquin Regional Rail Commission is a public agency in California responsible for planning, managing, and overseeing regional passenger rail services in the San Joaquin Valley and surrounding areas.
-
C.
Amtrak Capitol Corridor
Amtrak Capitol Corridor is a passenger rail service in Northern California that connects Sacramento, the San Francisco Bay Area, and San Jose with frequent, commuter-oriented trains.
-
D.
Santa Clara Valley Transportation Authority
The Santa Clara Valley Transportation Authority is the public transit agency that operates bus, light rail, and related transportation services throughout Santa Clara County in California’s Silicon Valley.
-
E.
Sacramento Southern Railroad
The Sacramento Southern Railroad is a heritage railway in Sacramento, California, offering excursion train rides along the Sacramento River as part of the California State Railroad Museum’s 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: Capitol Corridor Joint Powers Authority Target entity description: The Capitol Corridor Joint Powers Authority is a California-based public agency that oversees and manages Amtrak’s Capitol Corridor intercity passenger rail service between the Sacramento–San Francisco Bay Area region and surrounding communities.
-
A.
Peninsula Corridor Joint Powers Board
The Peninsula Corridor Joint Powers Board is a public agency formed by Bay Area counties to oversee and manage the Caltrain commuter rail service along the San Francisco Peninsula.
-
B.
San Joaquin Regional Rail Commission
The San Joaquin Regional Rail Commission is a public agency in California responsible for planning, managing, and overseeing regional passenger rail services in the San Joaquin Valley and surrounding areas.
-
C.
Amtrak Capitol Corridor
Amtrak Capitol Corridor is a passenger rail service in Northern California that connects Sacramento, the San Francisco Bay Area, and San Jose with frequent, commuter-oriented trains.
-
D.
Santa Clara Valley Transportation Authority
The Santa Clara Valley Transportation Authority is the public transit agency that operates bus, light rail, and related transportation services throughout Santa Clara County in California’s Silicon Valley.
-
E.
Sacramento Southern Railroad
The Sacramento Southern Railroad is a heritage railway in Sacramento, California, offering excursion train rides along the Sacramento River as part of the California State Railroad Museum’s operations.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
joint powers authority
ⓘ
public agency ⓘ regional rail authority ⓘ |
| boardComposition | representatives of member agencies ⓘ |
| collaboratesWith |
California Department of Transportation
ⓘ
linked to:
Caltrans
Metropolitan Planning Organizations in Northern California ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| focus |
intercity rail connectivity between Sacramento and the San Francisco Bay Area
ⓘ
multimodal connections to surrounding communities ⓘ |
| fundingSource |
State of California
ⓘ
linked to:
California, United States
fare revenue ⓘ member agencies ⓘ |
| governingBoardType | board of directors ⓘ |
| headquartersLocation |
Oakland, California
ⓘ
linked to:
Oakland
|
| jurisdiction |
State of California
ⓘ
linked to:
California, United States
|
| languageOfWork | English ⓘ |
| memberAgency |
Alameda-Contra Costa Transit District
ⓘ
Placer County Transportation Planning Agency ⓘ Sacramento Regional Transit District ⓘ
linked to:
Sacramento Regional Transit
San Francisco Bay Area Rapid Transit District ⓘ Santa Clara Valley Transportation Authority ⓘ Solano Transportation Authority ⓘ Yolo County Transportation District ⓘ |
| modeOfTransport | rail ⓘ |
| operatesRailService |
Capitol Corridor
ⓘ
linked to:
Amtrak Capitol Corridor
|
| overseesOperator | Amtrak ⓘ |
| parentProgram | California intercity passenger rail program ⓘ |
| primaryFunction | planning and management of Capitol Corridor service ⓘ |
| responsibility |
capital improvements planning
ⓘ
coordination with host railroads ⓘ coordination with local transit agencies ⓘ service performance monitoring ⓘ service planning ⓘ |
| routeEndpoints |
Auburn, California
ⓘ
Sacramento, California ⓘ
linked to:
Sacramento
San Jose, California ⓘ
linked to:
San Jose, California, United States
|
| serviceArea |
Northern California
ⓘ
Sacramento–San Francisco Bay Area region ⓘ
linked to:
Sacramento metropolitan area
|
| serviceBrand |
Capitol Corridor
ⓘ
linked to:
Amtrak Capitol Corridor
|
| serviceType | intercity passenger rail ⓘ |
| shortName | CCJPA ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| usesRailInfrastructureOf | Union Pacific Railroad ⓘ |
| website | https://www.capitolcorridor.org/ ⓘ |
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: Capitol Corridor Joint Powers Authority Description of subject: The Capitol Corridor Joint Powers Authority is a California-based public agency that oversees and manages Amtrak’s Capitol Corridor intercity passenger rail service between the Sacramento–San Francisco Bay Area region and surrounding communities.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
Amtrak Capitol Corridor at Richmond station
→
railOperator
→
Capitol Corridor Joint Powers Authority
ⓘ
linked to: Capitol Corridor Joint Powers Authority