Line 3
E641773
Line 3 is a major line of the Sofia Metro rapid transit system in Sofia, Bulgaria, serving key residential and commercial areas of the city.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Line 3 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7114676 — 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 3 Context triple: [Sofia Metro, hasLine, Line 3]
-
A.
Line 3
Line 3 is a rapid transit line of the Toronto subway system, commonly known as the Scarborough RT, that served the Scarborough district.
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B.
Line 3
Line 3 is a future rapid transit route of the Seville Metro intended to extend and improve the city’s urban rail network.
-
C.
Line 3
Line 3 is a major north–south route of the Tehran Metro system, connecting key residential and commercial areas across the city.
-
D.
Line 3
Line 3 is a major north–south rapid transit route of the Shanghai Metro system, known for its elevated tracks and extensive coverage across the city.
-
E.
Line 3
Line 3 is a major line of the Moscow Metro system, known for serving central Moscow and connecting key residential and commercial districts.
- 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 3 Target entity description: Line 3 is a major line of the Sofia Metro rapid transit system in Sofia, Bulgaria, serving key residential and commercial areas of the city.
-
A.
Line 3
Line 3 is a major line of the Moscow Metro system, known for serving central Moscow and connecting key residential and commercial districts.
-
B.
Line 3
Line 3 is a major line of the Saint Petersburg Metro system, serving as one of the city's primary rapid transit routes.
-
C.
Line 3
Line 3 is a major north–south route of the Seoul Metropolitan Subway system, connecting key residential and commercial districts across the city and into surrounding areas.
-
D.
Line 3
Line 3 is a major rapid transit route of the STC Metro system, serving key districts along its corridor.
-
E.
Line 3
Line 3 is a major north–south route of the Tehran Metro system, connecting key residential and commercial areas across the city.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf | metro line ⓘ |
| cityServed | Sofia ⓘ |
| connectsTo |
Line 1 (Sofia Metro)
ⓘ
linked to:
Metro Line 1
Line 2 (Sofia Metro) ⓘ |
| continent | Europe ⓘ |
| country | Bulgaria ⓘ |
| electrification | electric railway ⓘ |
| fareMedium |
contactless smart cards
ⓘ
mobile tickets ⓘ paper tickets ⓘ |
| fareSystem | Sofia public transport tariff system ⓘ |
| hasAccessibilityFeature |
elevators
ⓘ
escalators ⓘ step-free access ⓘ |
| hasFareCollection |
contactless cards
ⓘ
ticket barriers ⓘ |
| hasLanguageOfSignage |
Bulgarian
ⓘ
English ⓘ |
| hasRollingStockType | metro trains ⓘ |
| hasServiceFrequencyType | high frequency ⓘ |
| isElectrified | true ⓘ |
| isGradeSeparated | true ⓘ |
| isMassTransit | true ⓘ |
| isPartOfNetwork | Sofia Metro network ⓘ |
| isPassengerOnly | true ⓘ |
| isUnderground | partly ⓘ |
| isUrbanRailway | true ⓘ |
| locatedIn |
Bulgaria
ⓘ
Sofia ⓘ |
| operator |
Metropolitan Sofia JSC
ⓘ
linked to:
Metropoliten JSC
|
| owner |
Metropolitan Sofia JSC
ⓘ
linked to:
Metropoliten JSC
|
| partOf | Sofia Metro ⓘ |
| publicTransportType | metro ⓘ |
| railGauge | standard gauge ⓘ |
| safetySystem | automatic train protection ⓘ |
| servesAreaType |
commercial areas
ⓘ
residential areas ⓘ |
| serviceType | rapid transit ⓘ |
| trackType | double track ⓘ |
| transportationSystem | Sofia Metro ⓘ |
| 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: Line 3 Description of subject: Line 3 is a major line of the Sofia Metro rapid transit system in Sofia, Bulgaria, serving key residential and commercial areas of the city.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.