M2 line
E415401
The M2 line is one of the main lines of the Helsinki Metro rapid transit system, serving key districts across the Helsinki metropolitan area.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M2 line canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4098510 — 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: M2 line Context triple: [Helsinki Metro, hasLine, M2 line]
-
A.
M2 line
The M2 line is a major rapid transit route within the Ankara Metro system in Turkey, serving key districts of the capital city.
-
B.
M3 line
The M3 line is a rapid transit route within the Ankara Metro system serving parts of Turkey’s capital city.
-
C.
M1 line
The M1 line is a primary rapid transit route of the Ankara Metro system serving key districts of Turkey’s capital city.
-
D.
M1 line
The M1 line is one of the main lines of the Helsinki Metro, running east–west through the Helsinki region and serving several key suburban and central stations.
-
E.
M4 line
The M4 line is a rapid transit route within the Ankara Metro system serving passengers in Turkey’s capital city.
- 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: M2 line Target entity description: The M2 line is one of the main lines of the Helsinki Metro rapid transit system, serving key districts across the Helsinki metropolitan area.
-
A.
M2 line
The M2 line is a major rapid transit route within the Ankara Metro system in Turkey, serving key districts of the capital city.
-
B.
M3 line
The M3 line is a rapid transit route within the Ankara Metro system serving parts of Turkey’s capital city.
-
C.
M1 line
The M1 line is a primary rapid transit route of the Ankara Metro system serving key districts of Turkey’s capital city.
-
D.
M1 line
The M1 line is one of the main lines of the Helsinki Metro, running east–west through the Helsinki region and serving several key suburban and central stations.
-
E.
M4 line
The M4 line is a rapid transit route within the Ankara Metro system serving passengers in Turkey’s capital city.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
metro line
ⓘ
public transport route ⓘ |
| connects |
central Helsinki
ⓘ
eastern Helsinki ⓘ western Helsinki metropolitan area ⓘ |
| country | Finland ⓘ |
| electrification | 750 V DC third rail ⓘ |
| fareSystem | HSL zonal fare system ⓘ |
| hasAccessibilityFeature | step-free access at stations ⓘ |
| hasColor | orange ⓘ |
| hasPlatformType | island platforms ⓘ |
| hasServiceType | all-stations service ⓘ |
| isOwnedBy |
City of Helsinki
ⓘ
linked to:
Helsinki
|
| isPartOfNetwork |
Helsinki regional public transport network
ⓘ
linked to:
Helsinki public transport network
|
| locatedIn |
Finland
ⓘ
Helsinki metropolitan area ⓘ
linked to:
Greater Helsinki
|
| operator |
HSL
ⓘ
Helsingin seudun liikenne ⓘ |
| partOf | Helsinki Metro ⓘ |
| safetySystem | automatic train control ⓘ |
| serves |
Espoo
ⓘ
Helsinki ⓘ |
| systemType | rapid transit ⓘ |
| ticketingSystem |
contactless smart card
ⓘ
mobile ticketing ⓘ |
| trackGauge | standard gauge ⓘ |
| transportMode | rail ⓘ |
| usesRollingStock |
M100 metro trains
ⓘ
linked to:
M100 series trains
M200 metro trains ⓘ M300 metro trains ⓘ |
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: M2 line Description of subject: The M2 line is one of the main lines of the Helsinki Metro rapid transit system, serving key districts across the Helsinki metropolitan area.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.