T4
E403257
T4 is one of the lines of the Athens tram system, providing urban light-rail service across part of the Athens metropolitan area.
All labels observed (1)
| Label | Occurrences |
|---|---|
| T4 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3980145 — 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: T4 Context triple: [Athens tram network, hasLine, T4]
-
A.
T4
T4 is a light rail/tram line of the Trambesòs network serving the Barcelona metropolitan area.
-
B.
T3
T3 is one of the tram lines of the Trambaix light rail network serving the Barcelona metropolitan area.
-
C.
T5
T5 is a major passenger terminal at London Heathrow Airport, primarily serving British Airways and Iberia flights.
-
D.
T5
T5 is a former passenger terminal of Berlin Brandenburg Airport that handled commercial air traffic before being closed to operations.
-
E.
T5
T5 is a tram line of the Trambesòs light rail network serving the Barcelona metropolitan area.
- 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: T4 Target entity description: T4 is one of the lines of the Athens tram system, providing urban light-rail service across part of the Athens metropolitan area.
-
A.
T4
T4 is a light rail/tram line of the Trambesòs network serving the Barcelona metropolitan area.
-
B.
T3
T3 is one of the tram lines of the Trambaix light rail network serving the Barcelona metropolitan area.
-
C.
T5
T5 is a major passenger terminal at London Heathrow Airport, primarily serving British Airways and Iberia flights.
-
D.
T5
T5 is a former passenger terminal of Berlin Brandenburg Airport that handled commercial air traffic before being closed to operations.
-
E.
T5
T5 is a tram line of the Trambesòs light rail network serving the Barcelona metropolitan area.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
public transport route
ⓘ
tram line ⓘ |
| category | Tram lines in Athens ⓘ |
| country | Greece ⓘ |
| electrification | overhead line ⓘ |
| fareSystem | Athens integrated public transport fares ⓘ |
| governedBy |
Greek transport authorities
ⓘ
linked to:
OASA (Athens Urban Transport Organisation)
|
| hasLineNumber | T4 ⓘ |
| hasService | regular scheduled service ⓘ |
| isPartOf |
Athens urban rail network
ⓘ
linked to:
Athens public transport network
|
| locatedIn |
Athens
ⓘ
Athens metropolitan area ⓘ Greece ⓘ |
| networkType | tramway network ⓘ |
| operatedBy | Athens tram operator ⓘ |
| operatesIn | Athens metropolitan area ⓘ |
| partOf |
Athens tram system
ⓘ
linked to:
Athens tram network
public transport in Athens ⓘ |
| railGauge | standard gauge ⓘ |
| regionServed | Attica region ⓘ |
| serviceType | urban transit ⓘ |
| system |
Athens tram system
ⓘ
linked to:
Athens tram network
|
| transportMode |
light rail
ⓘ
tram ⓘ |
| usedFor | passenger transport ⓘ |
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: T4 Description of subject: T4 is one of the lines of the Athens tram system, providing urban light-rail service across part of the Athens metropolitan area.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
T4