Metro line 51
E113961
Metro line 51 is a former hybrid metro/light rail line in Amsterdam that connected the city center with the southern suburbs, including Amsterdam Zuid.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Line 51B | 2 |
| Metro Line 51 | 1 |
| Metro line 51 canonical | 1 |
| metro line 51 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T951104 — 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: Metro line 51 Context triple: [Amsterdam Zuid, metroLines, Metro line 51]
-
A.
Metro line 50
Metro line 50 is a rapid transit line in Amsterdam that runs in an east–west arc connecting several major residential and business districts without passing through the historic city center.
-
B.
Metro Line 6
Metro Line 6 is a line of the Mexico City Metro system that serves the northern part of the city, including the Gustavo A. Madero borough.
-
C.
Metro Line 3
Metro Line 3 is a major Mexico City Metro route that runs north–south across the city, connecting key residential and commercial areas including the Gustavo A. Madero borough.
-
D.
Metrobus Line 5
Metrobus Line 5 is a bus rapid transit route in Mexico City that serves the borough of Venustiano Carranza and connects it with other key areas of the city.
-
E.
Metro A Line
The Metro A Line is a light rail line in Los Angeles County that runs between downtown Los Angeles and Long Beach as part of the region’s Metro Rail system.
- 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: Metro line 51 Target entity description: Metro line 51 is a former hybrid metro/light rail line in Amsterdam that connected the city center with the southern suburbs, including Amsterdam Zuid.
-
A.
Metro line 50
Metro line 50 is a rapid transit line in Amsterdam that runs in an east–west arc connecting several major residential and business districts without passing through the historic city center.
-
B.
Metro Line 6
Metro Line 6 is a line of the Mexico City Metro system that serves the northern part of the city, including the Gustavo A. Madero borough.
-
C.
Metro Line 3
Metro Line 3 is a major Mexico City Metro route that runs north–south across the city, connecting key residential and commercial areas including the Gustavo A. Madero borough.
-
D.
Metrobus Line 5
Metrobus Line 5 is a bus rapid transit route in Mexico City that serves the borough of Venustiano Carranza and connects it with other key areas of the city.
-
E.
Metro A Line
The Metro A Line is a light rail line in Los Angeles County that runs between downtown Los Angeles and Long Beach as part of the region’s Metro Rail system.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
former metro line
ⓘ
hybrid metro/light rail line ⓘ public transport line ⓘ |
| closureDate | 2019 ⓘ |
| colorOnMap | orange ⓘ |
| connects |
Amsterdam Zuid with Amstelveen
ⓘ
Amsterdam city centre with southern suburbs ⓘ |
| conversion | partly converted to tram line 25 ⓘ |
| country | Netherlands ⓘ |
| electrification |
600 V DC overhead line
ⓘ
750 V DC third rail ⓘ |
| gauge | standard gauge ⓘ |
| lineNumber | 51 ⓘ |
| locatedIn | Amsterdam ⓘ |
| networkSection | Amstelveenlijn ⓘ |
| notableFeature | first hybrid metro/light rail line in Amsterdam ⓘ |
| openingDate | 1990 ⓘ |
| operator | GVB ⓘ |
| partOf |
Amsterdam Metro
ⓘ
linked to:
Amsterdam Metro network
|
| platformType |
high platforms on metro section
ⓘ
low platforms on Amstelveenlijn section ⓘ |
| region | North Holland ⓘ |
| replacedBy |
Tram line 25 on Amstelveen corridor
ⓘ
linked to:
Tram line 25 (Amstelveenlijn)
|
| servedArea |
Amstelveen
ⓘ
Amsterdam Zuid ⓘ Amsterdam city centre ⓘ
linked to:
Amsterdam-Centrum
southern suburbs of Amsterdam ⓘ |
| servedMunicipality | Amstelveen ⓘ |
| servedStation |
Amsterdam Zuid
ⓘ
Station Duivendrecht ⓘ
linked to:
Duivendrecht railway station
Station RAI ⓘ |
| sharedTracksWith |
Metro line 50
ⓘ
Metro line 53 ⓘ
linked to:
Metro Line 53
Metro line 54 ⓘ
linked to:
Metro Line 54
|
| status | discontinued ⓘ |
| terminus |
Amsterdam Centraal
ⓘ
Westwijk ⓘ |
| trackConfiguration | double track ⓘ |
| transportType |
light rail
ⓘ
metro ⓘ |
| usedRollingStock |
M4 metro trains
ⓘ
S1/S2 light rail vehicles ⓘ |
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: Metro line 51 Description of subject: Metro line 51 is a former hybrid metro/light rail line in Amsterdam that connected the city center with the southern suburbs, including Amsterdam Zuid.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Metro line 51
linked to: Metro line 51
linked to: Metro line 51
linked to: Metro line 51