San Diego Metropolitan Transit System
E266739
The San Diego Metropolitan Transit System is the public transportation agency that operates buses and light rail services throughout the San Diego, California metropolitan area.
All labels observed (4)
How this entity was disambiguated
This entity first appeared as the object of triple T2440241 — 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: San Diego Metropolitan Transit System Context triple: [Siemens S700, operator, San Diego Metropolitan Transit System]
-
A.
North County Transit District
North County Transit District is a public transportation agency serving northern San Diego County, California, operating commuter rail, light rail, and bus services.
-
B.
Foothill Transit
Foothill Transit is a public bus transit agency serving communities in the San Gabriel and Pomona Valleys of Los Angeles County, California.
-
C.
Long Beach Transit
Long Beach Transit is a public transportation agency serving the city of Long Beach and surrounding communities in Southern California with bus and related transit services.
-
D.
Lane Transit District
Lane Transit District is the public transportation agency serving Eugene, Springfield, and surrounding communities in Lane County, Oregon, operating bus and bus rapid transit services.
-
E.
Sacramento Regional Transit
Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus services.
- 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: San Diego Metropolitan Transit System Target entity description: The San Diego Metropolitan Transit System is the public transportation agency that operates buses and light rail services throughout the San Diego, California metropolitan area.
-
A.
North County Transit District
North County Transit District is a public transportation agency serving northern San Diego County, California, operating commuter rail, light rail, and bus services.
-
B.
Foothill Transit
Foothill Transit is a public bus transit agency serving communities in the San Gabriel and Pomona Valleys of Los Angeles County, California.
-
C.
Long Beach Transit
Long Beach Transit is a public transportation agency serving the city of Long Beach and surrounding communities in Southern California with bus and related transit services.
-
D.
Lane Transit District
Lane Transit District is the public transportation agency serving Eugene, Springfield, and surrounding communities in Lane County, Oregon, operating bus and bus rapid transit services.
-
E.
Sacramento Regional Transit
Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus services.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
public transportation agency
ⓘ
transit authority ⓘ |
| collaboratesWith | North County Transit District ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| fareMedium |
contactless smart card
ⓘ
mobile ticketing app ⓘ |
| fareSystem |
PRONTO
ⓘ
surface form:
Pronto
|
| foundedBy |
California, United States
ⓘ
surface form:
State of California
|
| governingBody | MTS Board of Directors ⓘ |
| hasAbbreviation |
MTS
ⓘ
surface form:
SDMTS
|
| hasPredecessor |
San Diego Metropolitan Transit System
self-linksurface differs
ⓘ
surface form:
San Diego Metropolitan Transit Development Board
San Diego Metropolitan Transit System self-linksurface differs ⓘ
surface form:
San Diego Transit Corporation
|
| hasRouteType |
express bus routes
ⓘ
local bus routes ⓘ rapid bus routes ⓘ trolley lines ⓘ |
| hasServiceCharacteristic |
connects downtown San Diego with surrounding communities
ⓘ
integrated bus and light rail network ⓘ provides transit connections to major regional employment centers ⓘ provides transit connections to the U.S.–Mexico border at San Ysidro ⓘ |
| hasWebsite | https://www.sdmts.com/ ⓘ |
| headquartersLocation |
San Diego, California, United States
ⓘ
surface form:
San Diego, California
|
| industry | public transportation ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
San Diego ⓘ San Diego County ⓘ |
| modeOfTransport |
bus
ⓘ
light rail ⓘ |
| offersService |
commuter bus service
ⓘ
fixed-route bus service ⓘ light rail service ⓘ paratransit service ⓘ |
| officialLanguage | English ⓘ |
| operates |
MTS Bus
ⓘ
Rapid bus services ⓘ San Diego Trolley ⓘ |
| operatesIn |
East County region of San Diego County
ⓘ
surface form:
East County San Diego
San Diego, California, United States ⓘ
surface form:
San Diego, California
South Bay San Diego ⓘ |
| owns | San Diego Trolley light rail infrastructure ⓘ |
| regionServed | Southern California ⓘ |
| regulates | taxicab services in its jurisdiction ⓘ |
| serviceArea | San Diego metropolitan area ⓘ |
| shortName | MTS ⓘ |
| usesTicketingSystem |
distance- and zone-based fares on light rail
ⓘ
flat fares on most bus routes ⓘ |
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: San Diego Metropolitan Transit System Description of subject: The San Diego Metropolitan Transit System is the public transportation agency that operates buses and light rail services throughout the San Diego, California metropolitan area.
Referenced by (30)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Siemens S700
La Mesa, California, United States
→
hasPublicTransportOperator
→
San Diego Metropolitan Transit System
ⓘ
subject surface form:
La Mesa, California
San Diego Metropolitan Transit System
→
hasPredecessor
→
San Diego Metropolitan Transit System
self-linksurface differs
ⓘ
this entity surface form:
San Diego Metropolitan Transit Development Board
San Diego Metropolitan Transit System
→
hasPredecessor
→
San Diego Metropolitan Transit System
self-linksurface differs
ⓘ
this entity surface form:
San Diego Transit Corporation
this entity surface form:
San Diego Metropolitan Transit System Board of Directors