Tehran Metro Line 3
E724711
Tehran Metro Line 3 is a major north–south rapid transit line in Tehran’s metro network, serving as one of the city’s key high-capacity urban rail corridors.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Tehran Metro Line 3 canonical | 3 |
| Line 3 (Tehran Metro) | 1 |
| Tehran Metro Line 3 at Teatr-e Shahr | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8048276 — 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: Tehran Metro Line 3 Context triple: [Line 1 (Tehran Metro), connectsWithLine, Tehran Metro Line 3]
-
A.
Tehran Metro Line 2
Tehran Metro Line 2 is a major east–west rapid transit line in Tehran’s metro system, serving numerous central and western districts and providing key transfer connections with several other lines.
-
B.
Tehran Metro Line 4
Tehran Metro Line 4 is one of the main east–west rapid transit lines in Tehran’s metro network, serving key urban areas and providing access to major hubs including the route toward Mehrabad International Airport.
-
C.
Tehran Metro Line 9
Tehran Metro Line 9 is a planned rapid transit line intended to expand and improve the urban rail network in Iran’s capital, Tehran.
-
D.
Tehran Metro Line 8
Tehran Metro Line 8 is a planned or operational rapid transit line within the Tehran Metro system, serving as part of the urban rail network in Iran’s capital.
-
E.
Tehran Metro
Tehran Metro is the rapid transit system serving Iran’s capital, providing extensive urban and suburban rail transport across the Tehran metropolitan area.
- 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: Tehran Metro Line 3 Target entity description: Tehran Metro Line 3 is a major north–south rapid transit line in Tehran’s metro network, serving as one of the city’s key high-capacity urban rail corridors.
-
A.
Tehran Metro Line 2
Tehran Metro Line 2 is a major east–west rapid transit line in Tehran’s metro system, serving numerous central and western districts and providing key transfer connections with several other lines.
-
B.
Tehran Metro Line 4
Tehran Metro Line 4 is one of the main east–west rapid transit lines in Tehran’s metro network, serving key urban areas and providing access to major hubs including the route toward Mehrabad International Airport.
-
C.
Tehran Metro Line 9
Tehran Metro Line 9 is a planned rapid transit line intended to expand and improve the urban rail network in Iran’s capital, Tehran.
-
D.
Tehran Metro Line 8
Tehran Metro Line 8 is a planned or operational rapid transit line within the Tehran Metro system, serving as part of the urban rail network in Iran’s capital.
-
E.
Tehran Metro
Tehran Metro is the rapid transit system serving Iran’s capital, providing extensive urban and suburban rail transport across the Tehran metropolitan area.
- F. None of above. chosen
Statements (38)
| Predicate | Object |
|---|---|
| instanceOf |
metro line
ⓘ
public transport infrastructure ⓘ |
| connects |
northern Tehran
ⓘ
southern Tehran ⓘ |
| electrification | electric traction ⓘ |
| fareSystem | Tehran Metro unified fare system ⓘ |
| hasAccessibility | designed for high passenger capacity ⓘ |
| hasColor | light blue ⓘ |
| hasDirection | north–south ⓘ |
| hasEnvironmentalImpact |
reduces air pollution compared to private cars
ⓘ
reduces road traffic congestion in Tehran ⓘ |
| hasFunction |
mass transit
ⓘ
passenger transport ⓘ urban rail corridor ⓘ |
| hasRightOfWay | exclusive ⓘ |
| hasRollingStockType | electric multiple units ⓘ |
| hasServiceType | all-stations stopping service ⓘ |
| hasType | underground railway (primarily) ⓘ |
| isGradeSeparated | yes ⓘ |
| isHighCapacity | yes ⓘ |
| isKeyCorridorFor | high-capacity urban rail ⓘ |
| isMajorComponentOf | Tehran urban rail network NERFINISHED ⓘ |
| isMassTransitBackbone | yes ⓘ |
| isPublicTransport | yes ⓘ |
| isUrbanRail | yes ⓘ |
| locatedIn |
Tehran
ⓘ
Tehran Province ⓘ |
| locatedInCountry | Iran NERFINISHED ⓘ |
| networkRole | backbone north–south axis of Tehran Metro ⓘ |
| operator | Tehran Urban and Suburban Railways Organization NERFINISHED ⓘ |
| owner | Tehran Urban and Suburban Railways Organization NERFINISHED ⓘ |
| partOf | Tehran Metro NERFINISHED ⓘ |
| safetySystem | signal-controlled ⓘ |
| serves |
Tehran residents
ⓘ
commuters in Tehran ⓘ |
| system | Tehran Metro NERFINISHED ⓘ |
| ticketing | smart card compatible ⓘ |
| transportMode | rail ⓘ |
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: Tehran Metro Line 3 Description of subject: Tehran Metro Line 3 is a major north–south rapid transit line in Tehran’s metro network, serving as one of the city’s key high-capacity urban rail corridors.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Line 1 (Tehran Metro)
subject surface form:
Line 6 (Tehran Metro)
subject surface form:
Line 4 (Tehran Metro)
this entity surface form:
Line 3 (Tehran Metro)
subject surface form:
Line 4 (Tehran Metro)
this entity surface form:
Tehran Metro Line 3 at Teatr-e Shahr