Robertson Tunnel
E99274
Robertson Tunnel is a major light rail tunnel in Portland, Oregon, carrying MAX trains through the West Hills between downtown and the city’s western suburbs.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Robertson Tunnel canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T807212 — 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: Robertson Tunnel Context triple: [MAX Light Rail, notableStructure, Robertson Tunnel]
-
A.
Malinta Tunnel
Malinta Tunnel is a historic underground complex on Corregidor Island in the Philippines that served as a bomb-proof headquarters and hospital for American and Filipino forces during World War II.
-
B.
Shandaken Tunnel
The Shandaken Tunnel is an aqueduct in New York State that diverts water from the Schoharie Reservoir to the Esopus Creek as part of the New York City water supply system.
-
C.
Queensway Tunnel
The Queensway Tunnel is a road tunnel in northwest England that carries vehicular traffic beneath the River Mersey between Liverpool and the Wirral Peninsula.
-
D.
Downtown Tunnel
The Downtown Tunnel is a major underwater vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
-
E.
Mont Blanc Tunnel
The Mont Blanc Tunnel is a major trans-Alpine road tunnel linking France and Italy beneath the Mont Blanc massif, serving as a key route for international traffic through the Alps.
- 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: Robertson Tunnel Target entity description: Robertson Tunnel is a major light rail tunnel in Portland, Oregon, carrying MAX trains through the West Hills between downtown and the city’s western suburbs.
-
A.
Malinta Tunnel
Malinta Tunnel is a historic underground complex on Corregidor Island in the Philippines that served as a bomb-proof headquarters and hospital for American and Filipino forces during World War II.
-
B.
Shandaken Tunnel
The Shandaken Tunnel is an aqueduct in New York State that diverts water from the Schoharie Reservoir to the Esopus Creek as part of the New York City water supply system.
-
C.
Queensway Tunnel
The Queensway Tunnel is a road tunnel in northwest England that carries vehicular traffic beneath the River Mersey between Liverpool and the Wirral Peninsula.
-
D.
Downtown Tunnel
The Downtown Tunnel is a major underwater vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
-
E.
Mont Blanc Tunnel
The Mont Blanc Tunnel is a major trans-Alpine road tunnel linking France and Italy beneath the Mont Blanc massif, serving as a key route for international traffic through the Alps.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
rail tunnel
ⓘ
transport infrastructure ⓘ |
| carries |
MAX Light Rail
ⓘ
light rail trains ⓘ |
| connects |
City Center / Downtown Portland
ⓘ
surface form:
downtown Portland
western suburbs of Portland ⓘ |
| constructionStart | 1993 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| feature |
double-track tunnel
ⓘ
emergency exits ⓘ ventilation shafts ⓘ |
| hasSignificance | major light rail link between downtown Portland and western suburbs ⓘ |
| hasStation | Washington Park station ⓘ |
| hasStructure | two parallel bores ⓘ |
| length |
approximately 3 miles
ⓘ
approximately 4.8 kilometers ⓘ |
| locatedInMetropolitanArea | Portland metropolitan area ⓘ |
| location |
Portland, Oregon, United States
ⓘ
surface form:
Portland, Oregon
|
| namedAfter | William G. Robertson ⓘ |
| opened | 1998 ⓘ |
| operator | TriMet ⓘ |
| owner | TriMet ⓘ |
| partOf |
MAX Light Rail
ⓘ
surface form:
MAX Light Rail system
|
| passesThrough | West Hills ⓘ |
| passesUnder | Oregon Route 26 vicinity ⓘ |
| servesLine |
MAX Blue Line
ⓘ
MAX Red Line ⓘ MAX Yellow Line ⓘ
surface form:
MAX Yellow Line (historical or partial operations, if applicable)
|
| usedFor | public 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: Robertson Tunnel Description of subject: Robertson Tunnel is a major light rail tunnel in Portland, Oregon, carrying MAX trains through the West Hills between downtown and the city’s western suburbs.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.