Athens Metro Line 1
E938491
Athens Metro Line 1 is the oldest line of the Athens Metro system, running mostly overground and connecting the northern suburbs with the city center and the port of Piraeus.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Athens Metro Line 1 canonical | 5 |
| Line 1 (Athens Metro) | 3 |
| Athens Metro Line 1 terminus | 1 |
| Athens–Piraeus Electric Railways | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11629698 — 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: Athens Metro Line 1 Context triple: [Marousi, transportConnection, Athens Metro Line 1]
-
A.
Athens Metro
The Athens Metro is the rapid transit system serving Greece's capital, combining modern underground lines with some of the world’s oldest continuously operating urban rail infrastructure.
-
B.
Athens Suburban Railway
The Athens Suburban Railway is a regional rail network serving the greater Athens metropolitan area, connecting the city with its international airport and surrounding regions.
-
C.
Athens tram network
The Athens tram network is a modern light rail system in Athens, Greece, connecting key coastal and central districts and serving as an important component of the city's public transportation.
-
D.
Athens trolleybus network
The Athens trolleybus network is an electric public transit system of trolleybus lines serving Athens and its surrounding metropolitan area.
-
E.
Patras–Athens railway line
The Patras–Athens railway line is a major rail corridor in Greece connecting the port city of Patras in the Peloponnese with the capital city of Athens, serving as a key route for both passenger and freight transport.
- 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: Athens Metro Line 1 Target entity description: Athens Metro Line 1 is the oldest line of the Athens Metro system, running mostly overground and connecting the northern suburbs with the city center and the port of Piraeus.
-
A.
Athens Metro
The Athens Metro is the rapid transit system serving Greece's capital, combining modern underground lines with some of the world’s oldest continuously operating urban rail infrastructure.
-
B.
Athens Suburban Railway
The Athens Suburban Railway is a regional rail network serving the greater Athens metropolitan area, connecting the city with its international airport and surrounding regions.
-
C.
Athens tram network
The Athens tram network is a modern light rail system in Athens, Greece, connecting key coastal and central districts and serving as an important component of the city's public transportation.
-
D.
Athens trolleybus network
The Athens trolleybus network is an electric public transit system of trolleybus lines serving Athens and its surrounding metropolitan area.
-
E.
Patras–Athens railway line
The Patras–Athens railway line is a major rail corridor in Greece connecting the port city of Patras in the Peloponnese with the capital city of Athens, serving as a key route for both passenger and freight transport.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Athens Metro line
ⓘ
railway line ⓘ rapid transit line ⓘ |
| alsoKnownAs |
Green Line
NERFINISHED
ⓘ
Line 1 NERFINISHED ⓘ Piraeus–Kifissia line NERFINISHED ⓘ ΗΣΑΠ ⓘ |
| character |
mostly overground
ⓘ
partly underground ⓘ |
| colorOnSystemMap | green ⓘ |
| connects |
Athens city centre
NERFINISHED
ⓘ
Kifissia NERFINISHED ⓘ Piraeus NERFINISHED ⓘ |
| electrification | third rail ⓘ |
| hasInterchangeWith |
Athens Metro Line 2
NERFINISHED
ⓘ
Athens Metro Line 3 NERFINISHED ⓘ |
| hasStation |
Agios Nikolaos
NERFINISHED
ⓘ
Attiki NERFINISHED ⓘ Faliro NERFINISHED ⓘ Iraklio NERFINISHED ⓘ Kallithea NERFINISHED ⓘ Kato Patissia NERFINISHED ⓘ Marousi NERFINISHED ⓘ Monastiraki NERFINISHED ⓘ Moschato NERFINISHED ⓘ Nea Ionia NERFINISHED ⓘ Omonia NERFINISHED ⓘ Pefkakia NERFINISHED ⓘ Petralona NERFINISHED ⓘ Tavros NERFINISHED ⓘ Thissio NERFINISHED ⓘ Victoria NERFINISHED ⓘ |
| isOldestLineOf | Athens Metro NERFINISHED ⓘ |
| locatedIn |
Athens
ⓘ
Greece ⓘ |
| numberOfTracks | 2 ⓘ |
| openedAsMetro | early 20th century ⓘ |
| openedAsRailway | 1869 ⓘ |
| operator | STASY NERFINISHED ⓘ |
| owner | Greek state NERFINISHED ⓘ |
| partOf | Athens Metro NERFINISHED ⓘ |
| serves |
northern suburbs of Athens
ⓘ
port of Piraeus NERFINISHED ⓘ |
| system | Athens Metro system NERFINISHED ⓘ |
| terminus |
Kifissia station
NERFINISHED
ⓘ
Piraeus station NERFINISHED ⓘ |
| trackGauge | standard gauge ⓘ |
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: Athens Metro Line 1 Description of subject: Athens Metro Line 1 is the oldest line of the Athens Metro system, running mostly overground and connecting the northern suburbs with the city center and the port of Piraeus.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Athens Metro Line 1 terminus
subject surface form:
Line 1 (Athens Metro)
this entity surface form:
Athens–Piraeus Electric Railways
subject surface form:
Line 2 (Athens Metro)
this entity surface form:
Line 1 (Athens Metro)
this entity surface form:
Line 1 (Athens Metro)
subject surface form:
Line 3 (Athens Metro)
this entity surface form:
Line 1 (Athens Metro)