Sound Transit
E40468
Sound Transit is the regional public transit agency that plans, builds, and operates light rail, commuter rail, and express bus services in the greater Puget Sound area of Washington State.
All labels observed (15)
How this entity was disambiguated
This entity first appeared as the object of triple T307028 — 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: Sound Transit Context triple: [Puget Sound region, hasTransportationAgency, Sound Transit]
-
A.
Sound Transit Link light rail
Sound Transit Link light rail is a regional rapid transit system serving Seattle and surrounding communities with frequent, high-capacity train service.
-
B.
TriMet
TriMet is the regional public transportation agency serving the Portland, Oregon metropolitan area, operating buses, light rail, and commuter rail services.
-
C.
Portland Bureau of Transportation
The Portland Bureau of Transportation is the city agency responsible for planning, building, managing, and maintaining Portland, Oregon’s transportation infrastructure and services.
-
D.
MAX Light Rail
MAX Light Rail is the metropolitan light rail transit system serving the Portland, Oregon, metropolitan area.
-
E.
MetroLink light rail
MetroLink light rail is the bi-state light rail transit system serving the Greater St. Louis area, providing regional passenger rail service across parts of Missouri and Illinois.
- 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: Sound Transit Target entity description: Sound Transit is the regional public transit agency that plans, builds, and operates light rail, commuter rail, and express bus services in the greater Puget Sound area of Washington State.
-
A.
Sound Transit Link light rail
Sound Transit Link light rail is a regional rapid transit system serving Seattle and surrounding communities with frequent, high-capacity train service.
-
B.
TriMet
TriMet is the regional public transportation agency serving the Portland, Oregon metropolitan area, operating buses, light rail, and commuter rail services.
-
C.
Portland Bureau of Transportation
The Portland Bureau of Transportation is the city agency responsible for planning, building, managing, and maintaining Portland, Oregon’s transportation infrastructure and services.
-
D.
MAX Light Rail
MAX Light Rail is the metropolitan light rail transit system serving the Portland, Oregon, metropolitan area.
-
E.
MetroLink light rail
MetroLink light rail is the bi-state light rail transit system serving the Greater St. Louis area, providing regional passenger rail service across parts of Missouri and Illinois.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
public transit agency
ⓘ
regional transit authority ⓘ |
| alsoKnownAs |
Central Puget Sound Regional Transit Authority
ⓘ
linked to:
Sound Transit
ST ⓘ |
| builds |
commuter rail infrastructure
ⓘ
light rail infrastructure ⓘ regional bus infrastructure ⓘ |
| collaboratesWith |
Community Transit
ⓘ
King County Metro ⓘ Pierce Transit ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| foundedBy | voters of the Central Puget Sound region ⓘ |
| fundedBy |
motor vehicle excise tax
ⓘ
rental car tax ⓘ sales tax ⓘ |
| governingBody | Sound Transit Board of Directors ⓘ |
| hasProject |
Sound Move
ⓘ
Sound Transit 2 ⓘ Sound Transit 3 ⓘ |
| hasService |
bus rapid transit (planned and operating)
ⓘ
park-and-ride facilities ⓘ transit centers ⓘ |
| hasWebsite | https://www.soundtransit.org ⓘ |
| headquartersLocation |
Seattle, Washington
ⓘ
linked to:
Seattle, Washington, United States
|
| inception | 1993 ⓘ |
| industry | public transportation ⓘ |
| jurisdiction |
Central Puget Sound region
ⓘ
linked to:
Puget Sound region
|
| legalForm | regional transit authority ⓘ |
| locatedIn |
Puget Sound region
ⓘ
Washington State ⓘ
linked to:
Washington
|
| modeOfTransport |
commuter rail
ⓘ
express bus ⓘ light rail ⓘ |
| officialName |
Central Puget Sound Regional Transit Authority
ⓘ
linked to:
Sound Transit
|
| operates |
Link light rail
ⓘ
ST Express bus ⓘ Sounder commuter rail ⓘ Tacoma Link light rail ⓘ
linked to:
Sound Transit
|
| operatesInMetropolitanArea | Seattle metropolitan area ⓘ |
| plans | regional high-capacity transit system ⓘ |
| region |
Central Puget Sound
ⓘ
linked to:
Puget Sound region
|
| regulates | no; it is an operator and planner, not a regulator ⓘ |
| serves |
King County, Washington
ⓘ
linked to:
King County
Pierce County, Washington ⓘ
linked to:
Pierce County
Snohomish County, Washington ⓘ
linked to:
Snohomish County
|
| serviceType |
mass transit
ⓘ
regional transit ⓘ |
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: Sound Transit Description of subject: Sound Transit is the regional public transit agency that plans, builds, and operates light rail, commuter rail, and express bus services in the greater Puget Sound area of Washington State.
Referenced by (114)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Sound Transit
subject linked to:
downtown Tacoma
linked to: Sound Transit
subject linked to:
MPI MP36PH-3C (leased or borrowed units, historically)