Line 1
E641771
Line 1 is the first and primary rapid transit line of the Sofia Metro system in Bulgaria, connecting key residential districts with the city center and major transport hubs.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Line 1 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7114674 — 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 1 Context triple: [Sofia Metro, hasLine, Line 1]
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A.
Line 1
Line 1 is the oldest and one of the busiest lines of the Santiago Metro, running primarily east–west across central Santiago, Chile.
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B.
Line 1
Line 1 is one of the main east–west rapid transit lines of the Beijing Subway, serving as a core corridor through central Beijing.
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C.
Line 1
Line 1 is the oldest and one of the busiest lines of the Mexico City Metro, running east–west across the city and serving many central, high-traffic stations.
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D.
Line 1
Line 1 is a major rapid transit line of the Guangzhou Metro system in Guangzhou, China, serving as one of the city's primary east–west corridors.
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E.
Line 1
Line 1 is a major north–south rapid transit line of the Shanghai Metro and one of the system’s oldest and busiest routes.
- 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 1 Target entity description: Line 1 is the first and primary rapid transit line of the Sofia Metro system in Bulgaria, connecting key residential districts with the city center and major transport hubs.
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A.
Line 1
Line 1 is the first and main rapid transit line of the Seville Metro system in Seville, Spain, connecting key districts across the metropolitan area.
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B.
Line 1
Line 1 is a major east–west rapid transit route of the Brussels Metro system, connecting key districts across the Belgian capital.
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C.
Line 1
Line 1 is the first planned rapid transit line of the Ho Chi Minh City Metro, intended to connect central districts with outlying areas as part of the city’s developing urban rail network.
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D.
Line 1
Line 1 is one of the main lines of the Barcelona Metro rapid transit system, running on a largely east–west axis and serving several key districts of the city.
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E.
Line 1
Line 1 is one of the main east–west rapid transit lines of the Beijing Subway, serving as a core corridor through central Beijing.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | rapid transit line ⓘ |
| cityServed | Sofia NERFINISHED ⓘ |
| connects |
Sofia city centre
NERFINISHED
ⓘ
major transport hubs in Sofia ⓘ residential districts of Sofia ⓘ |
| continent | Europe ⓘ |
| country | Bulgaria ⓘ |
| electrification | third rail ⓘ |
| fareSystem | integrated urban transport system of Sofia ⓘ |
| hasLanguageOfSignage |
Bulgarian
ⓘ
English ⓘ |
| hasRole | primary line of Sofia Metro ⓘ |
| hasStation |
Aleksandar Malinov
NERFINISHED
ⓘ
Business Park Sofia NERFINISHED ⓘ G.M. Dimitrov NERFINISHED ⓘ Konstantin Velichkov NERFINISHED ⓘ Lavov most NERFINISHED ⓘ Lyulin NERFINISHED ⓘ Mladost 1 NERFINISHED ⓘ Obelya NERFINISHED ⓘ Opalchenska NERFINISHED ⓘ Serdika NERFINISHED ⓘ Serdika II NERFINISHED ⓘ Slivnitsa NERFINISHED ⓘ Sofia University St. Kliment Ohridski NERFINISHED ⓘ |
| hasTerminus |
Business Park Sofia
NERFINISHED
ⓘ
Mladost 1 NERFINISHED ⓘ Obelya NERFINISHED ⓘ Slivnitsa NERFINISHED ⓘ |
| interchangeStation |
Obelya
NERFINISHED
ⓘ
Serdika NERFINISHED ⓘ |
| interchangeWith | Line 2 (Sofia Metro) NERFINISHED ⓘ |
| lineNumber | 1 ⓘ |
| locatedIn |
Bulgaria
NERFINISHED
ⓘ
Sofia NERFINISHED ⓘ |
| openingDate | 1998 ⓘ |
| operator | Metropoliten JSC NERFINISHED ⓘ |
| owner | Sofia Municipality NERFINISHED ⓘ |
| partOf | Sofia Metro NERFINISHED ⓘ |
| primaryFunction |
connect city centre with major transport hubs
ⓘ
connect residential districts with city centre ⓘ |
| publicTransportType | metro ⓘ |
| railGauge | standard gauge ⓘ |
| serviceType | rapid transit ⓘ |
| trackConfiguration | double track ⓘ |
| transportSystem | Sofia Metro NERFINISHED ⓘ |
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 1 Description of subject: Line 1 is the first and primary rapid transit line of the Sofia Metro system in Bulgaria, connecting key residential districts with the city center and major transport hubs.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.