Line 4
E195990
Line 4 is one of the main lines of the Tehran Metro rapid transit system, serving key east–west corridors across Iran’s capital city.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Line 4 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1658606 — 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: Line 4 Context triple: [Tehran Metro, hasLine, Line 4]
-
A.
Line 4
Line 4 is a route of Mexico City’s Metrobús bus rapid transit system that serves key corridors with dedicated lanes and high-capacity articulated buses.
-
B.
Line 4
Line 4 is a major line of the Santiago Metro in Chile, serving key residential and commercial areas in the southeastern part of the city.
-
C.
Line 4
Line 4 is a major north–south rapid transit route in the Beijing Subway system, serving key commercial, residential, and university areas of the city.
-
D.
Line 4
Line 4 is a rapid transit line of the Guangzhou Metro system in Guangzhou, China, serving key urban and suburban areas along its north–south corridor.
-
E.
Line 5
Line 5 is a major east–west rapid transit route in the Guangzhou Metro system, serving key urban districts and facilitating high-capacity cross-city travel.
- 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: Line 4 Target entity description: Line 4 is one of the main lines of the Tehran Metro rapid transit system, serving key east–west corridors across Iran’s capital city.
-
A.
Line 4
Line 4 is a route of Mexico City’s Metrobús bus rapid transit system that serves key corridors with dedicated lanes and high-capacity articulated buses.
-
B.
Line 4
Line 4 is a major line of the Santiago Metro in Chile, serving key residential and commercial areas in the southeastern part of the city.
-
C.
Line 4
Line 4 is a major north–south rapid transit route in the Beijing Subway system, serving key commercial, residential, and university areas of the city.
-
D.
Line 4
Line 4 is a rapid transit line of the Guangzhou Metro system in Guangzhou, China, serving key urban and suburban areas along its north–south corridor.
-
E.
Line 5
Line 5 is a major east–west rapid transit route in the Guangzhou Metro system, serving key urban districts and facilitating high-capacity cross-city travel.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
metro line
ⓘ
public transport infrastructure ⓘ |
| cityServed | Tehran ⓘ |
| connectsTo |
Tehran Metro Line 2 at Darvazeh Shemiran
ⓘ
linked to:
Tehran Metro Line 2
Tehran Metro Line 3 at Teatr-e Shahr ⓘ
linked to:
Tehran Metro Line 3
Tehran Metro Line 5 at Eram-e Sabz ⓘ Tehran Metro Line 6 at Shohada-ye Haftom-e Tir ⓘ |
| country | Iran ⓘ |
| direction | east–west ⓘ |
| electrification | third rail ⓘ |
| fareCollection |
contactless ticket
ⓘ
smart card ⓘ |
| fareSystem | Tehran Metro unified ticketing system ⓘ |
| hasBranch |
Mehrabad Airport branch
ⓘ
linked to:
Mehrabad International Airport
|
| hasCharacter |
elevated
ⓘ
underground ⓘ |
| hasColor | yellow ⓘ |
| hasInterchangeWith |
Line 2 (Tehran Metro)
ⓘ
linked to:
Tehran Metro Line 2
Line 3 (Tehran Metro) ⓘ
linked to:
Tehran Metro Line 3
Line 5 (Tehran Metro) ⓘ Line 6 (Tehran Metro) ⓘ
linked to:
Tehran Metro Line 6
|
| hasStation |
Eram-e Sabz Metro Station
ⓘ
Shahid Kolahdooz Metro Station ⓘ |
| isKeyComponentOf |
Tehran urban transport network
ⓘ
linked to:
Tehran urban road network
|
| isMajorAxisOf |
Tehran east–west public transport network
ⓘ
linked to:
Tehran Metro Line 2
|
| languageOfSignage |
English
ⓘ
Persian ⓘ |
| lineColorOnMap | yellow ⓘ |
| locatedIn |
Iran
ⓘ
Tehran ⓘ Tehran Province ⓘ |
| operator | Tehran Urban and Suburban Railways Organization ⓘ |
| owner | Tehran Urban and Suburban Railways Organization ⓘ |
| partOf | Tehran Metro ⓘ |
| safetySystem | automatic train protection ⓘ |
| serves |
Mehrabad International Airport
ⓘ
central Tehran ⓘ eastern Tehran ⓘ east–west corridors of Tehran ⓘ western Tehran ⓘ |
| system | Tehran Metro ⓘ |
| terminus |
Eram-e Sabz Metro Station
ⓘ
Shahid Kolahdooz Metro Station ⓘ |
| trackGauge | standard gauge ⓘ |
| transitType | rapid transit ⓘ |
| usesRollingStock |
Tehran Metro electric multiple units
ⓘ
linked to:
Tehran Metro
|
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: Line 4 Description of subject: Line 4 is one of the main lines of the Tehran Metro rapid transit system, serving key east–west corridors across Iran’s capital city.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.