Line 3
E338944
Line 3 is a major Athens Metro route that connects central Athens with key destinations including the Athens International Airport.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T3222084 — 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: [Athens Metro, hasLine, Line 3]
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A.
Line 3
Line 3 is a route of Mexico City’s Metrobús bus rapid transit system that serves key corridors with dedicated lanes and high-capacity articulated buses.
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B.
Line 3
Line 3 is a major rapid transit route of the Guangzhou Metro system, known for its high passenger volume and key role in connecting central urban areas with the airport and suburban districts.
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C.
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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D.
Line 3
Line 3 is a major trolleybus route within Geneva’s public transport system, connecting key districts of the city.
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E.
Line 3
Line 3 is one of the main lines of the Barcelona Metro system, running through central parts of the city and connecting several key stations and neighborhoods.
- 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 Athens Metro route that connects central Athens with key destinations including the Athens International Airport.
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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.
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B.
Line 3
Line 3 is a major rapid transit route of the Guangzhou Metro system, known for its high passenger volume and key role in connecting central urban areas with the airport and suburban districts.
-
C.
Line 3
Line 3 is one of the main lines of the Barcelona Metro system, running through central parts of the city and connecting several key stations and neighborhoods.
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D.
Line 3
Line 3 is a major north–south route of the Tehran Metro system, connecting key residential and commercial areas across the city.
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E.
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.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
metro line
ⓘ
rapid transit line ⓘ |
| alsoKnownAs | Blue Line ⓘ |
| characteristic |
direct airport rail link
ⓘ
major east–west axis of Athens Metro ⓘ |
| color | blue ⓘ |
| connects |
Athens International Airport
ⓘ
Piraeus ⓘ central Athens ⓘ |
| connectsWith |
Athens Suburban Railway
ⓘ
Line 1 (Athens Metro) ⓘ
linked to:
Athens Metro Line 1
Line 2 (Athens Metro) ⓘ
linked to:
Athens Metro Line 2
|
| country | Greece ⓘ |
| electrification | 750 V DC third rail ⓘ |
| extensionOpened |
2004
ⓘ
2020 ⓘ 2022 ⓘ |
| fareSystem | integrated Athens urban transport tariff ⓘ |
| hasNativeName |
Γραμμή 3
ⓘ
linked to:
Line 3
|
| hasStation |
Airport station
ⓘ
Doukissis Plakentias station ⓘ Egaleo station ⓘ Ethniki Amyna station ⓘ Kerameikos station ⓘ
linked to:
Kerameikos metro station
Monastiraki station ⓘ Nikaia station ⓘ Piraeus station ⓘ Syntagma station ⓘ
linked to:
Syntagma metro station
|
| languageOfName | Greek ⓘ |
| lineNumber | 3 ⓘ |
| locatedIn |
Athens
ⓘ
Attica ⓘ |
| opened | 2000 ⓘ |
| operator | STASY S.A. ⓘ |
| ownedBy |
Hellenic Republic
ⓘ
linked to:
Greece
|
| partOf | Athens Metro ⓘ |
| primaryFunction | urban and airport passenger transport ⓘ |
| serves |
Athens International Airport
ⓘ
Piraeus ⓘ central Athens ⓘ |
| system | Athens Metro ⓘ |
| terminus |
Athens International Airport station
ⓘ
Dimotiko Theatro station ⓘ |
| trackGauge | standard gauge ⓘ |
| transportMode | rail ⓘ |
| uses |
suburban railway infrastructure
ⓘ
surface alignment ⓘ underground alignment ⓘ |
| usesRollingStock | electric multiple units ⓘ |
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 Athens Metro route that connects central Athens with key destinations including the Athens International Airport.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.