Denver RTD A Line
E897315
The Denver RTD A Line is a commuter rail service that connects downtown Denver’s Union Station with Denver International Airport and several intermediate neighborhoods.
All labels observed (3)
| Label | Occurrences |
|---|---|
| A Line (RTD) | 1 |
| Denver A Line | 1 |
| Denver RTD A Line canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10964891 — 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: Denver RTD A Line Context triple: [DEN, hasPublicTransitConnection, Denver RTD A Line]
-
A.
R Line (Denver light rail)
The R Line is a light rail service in the Denver metropolitan area that runs primarily through Aurora, Colorado, connecting key suburbs, employment centers, and transfer points within the Regional Transportation District network.
-
B.
L Line (Denver light rail)
The L Line is a light rail service in Denver, Colorado, that runs through the city’s central and northeastern neighborhoods as part of the Denver RTD rail network.
-
C.
D Line (Denver light rail)
The D Line is a light rail service in Denver, Colorado, that runs through central and southern parts of the metropolitan area as part of the city’s RTD rail network.
-
D.
E Line (Denver light rail)
The E Line is a light rail service in the Denver metropolitan area that connects downtown Denver with southern suburbs as part of the region’s RTD rail network.
-
E.
N Line (Denver commuter rail)
The N Line is a commuter rail route in the Denver metropolitan area that provides passenger service between downtown Denver and northern suburbs as part of the region’s FasTracks transit expansion.
- 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: Denver RTD A Line Target entity description: The Denver RTD A Line is a commuter rail service that connects downtown Denver’s Union Station with Denver International Airport and several intermediate neighborhoods.
-
A.
R Line (Denver light rail)
The R Line is a light rail service in the Denver metropolitan area that runs primarily through Aurora, Colorado, connecting key suburbs, employment centers, and transfer points within the Regional Transportation District network.
-
B.
L Line (Denver light rail)
The L Line is a light rail service in Denver, Colorado, that runs through the city’s central and northeastern neighborhoods as part of the Denver RTD rail network.
-
C.
D Line (Denver light rail)
The D Line is a light rail service in Denver, Colorado, that runs through central and southern parts of the metropolitan area as part of the city’s RTD rail network.
-
D.
E Line (Denver light rail)
The E Line is a light rail service in the Denver metropolitan area that connects downtown Denver with southern suburbs as part of the region’s RTD rail network.
-
E.
N Line (Denver commuter rail)
The N Line is a commuter rail route in the Denver metropolitan area that provides passenger service between downtown Denver and northern suburbs as part of the region’s FasTracks transit expansion.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
airport rail link
ⓘ
commuter rail line ⓘ |
| alsoKnownAs | University of Colorado A Line ⓘ |
| cityServed |
Denver
ⓘ
linked to:
Denver, Colorado
|
| color | blue ⓘ |
| connects |
Denver International Airport
ⓘ
Denver Union Station ⓘ intermediate neighborhoods in Denver metropolitan area ⓘ |
| continent | North America ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| electrification | overhead catenary ⓘ |
| fareSystem | RTD fare zones ⓘ |
| gauge | standard gauge ⓘ |
| hasMode | rail ⓘ |
| hasStation |
Denver International Airport Station
ⓘ
linked to:
Denver Airport station
Denver Union Station ⓘ intermediate commuter rail stations ⓘ |
| isInNetwork | RTD rail network ⓘ |
| locatedIn |
Denver metropolitan area
ⓘ
linked to:
Denver–Aurora–Lakewood metropolitan area
Denver, Colorado ⓘ |
| openedForService | 2016 ⓘ |
| openingDate | April 2016 ⓘ |
| operator |
RTD Denver
ⓘ
linked to:
Denver RTD
Regional Transportation District ⓘ |
| owner |
Regional Transportation District
ⓘ
public transit agency ⓘ |
| partOf |
FasTracks program
ⓘ
linked to:
FasTracks rail lines
RTD commuter rail system ⓘ
linked to:
RTD commuter rail
|
| primaryFunction |
airport access
ⓘ
regional commuter transport ⓘ |
| purpose | connect downtown Denver to Denver International Airport ⓘ |
| regionServed | Front Range Urban Corridor ⓘ |
| rollingStock | electric multiple units ⓘ |
| safetySystem | positive train control ⓘ |
| serviceType |
commuter rail
ⓘ
passenger rail ⓘ |
| sponsor |
University of Colorado
ⓘ
linked to:
University of Colorado system
|
| state | Colorado ⓘ |
| terminus |
Denver International Airport
ⓘ
Denver Union Station ⓘ |
| trackConfiguration | double track on most of the route ⓘ |
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: Denver RTD A Line Description of subject: The Denver RTD A Line is a commuter rail service that connects downtown Denver’s Union Station with Denver International Airport and several intermediate neighborhoods.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Denver RTD A Line
linked to: Denver RTD A Line