Amsterdam Metro M4 series
E170672
The Amsterdam Metro M4 series is a generation of electric multiple-unit metro trains that operate on Amsterdam’s rapid transit network.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Amsterdam Metro M4 series canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T1443340 — 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: Amsterdam Metro M4 series Context triple: [Amsterdam Metro line 53, usesRollingStock, Amsterdam Metro M4 series]
-
A.
Amsterdam Metro network
The Amsterdam Metro network is the rapid transit system serving Amsterdam and surrounding areas, consisting of multiple underground and surface lines that connect key neighborhoods, suburbs, and transport hubs across the city.
-
B.
Amsterdam tram network
The Amsterdam tram network is an extensive urban light rail system that serves as a primary mode of public transportation throughout Amsterdam, connecting key squares, neighborhoods, and transit hubs.
-
C.
Amsterdam Metro line 51
Amsterdam Metro line 51 was a former hybrid metro–light rail line in Amsterdam that connected the city center with the southern suburbs, notably serving areas like Amstelveen.
-
D.
Amsterdam tram line 4
Amsterdam tram line 4 is a major tram route in Amsterdam that connects the city center with southern districts, serving key commercial and residential areas along its path.
-
E.
Amsterdam Metro line 53
Amsterdam Metro line 53 is a rapid transit line in Amsterdam that runs between Centraal Station and Gaasperplas, serving southeastern parts of the city.
- 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: Amsterdam Metro M4 series Target entity description: The Amsterdam Metro M4 series is a generation of electric multiple-unit metro trains that operate on Amsterdam’s rapid transit network.
-
A.
Amsterdam Metro network
The Amsterdam Metro network is the rapid transit system serving Amsterdam and surrounding areas, consisting of multiple underground and surface lines that connect key neighborhoods, suburbs, and transport hubs across the city.
-
B.
Amsterdam tram network
The Amsterdam tram network is an extensive urban light rail system that serves as a primary mode of public transportation throughout Amsterdam, connecting key squares, neighborhoods, and transit hubs.
-
C.
Amsterdam Metro line 51
Amsterdam Metro line 51 was a former hybrid metro–light rail line in Amsterdam that connected the city center with the southern suburbs, notably serving areas like Amstelveen.
-
D.
Amsterdam tram line 4
Amsterdam tram line 4 is a major tram route in Amsterdam that connects the city center with southern districts, serving key commercial and residential areas along its path.
-
E.
Amsterdam Metro line 53
Amsterdam Metro line 53 is a rapid transit line in Amsterdam that runs between Centraal Station and Gaasperplas, serving southeastern parts of the city.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
electric multiple unit
ⓘ
metro train ⓘ rolling stock series ⓘ |
| belongsTo | Amsterdam Metro rolling stock ⓘ |
| brakeType |
electrodynamic brakes
ⓘ
pneumatic brakes ⓘ |
| controlType | driver-operated ⓘ |
| country | Netherlands ⓘ |
| designedFor | high-frequency metro service ⓘ |
| doorConfiguration | multiple side doors per car ⓘ |
| doorType | sliding doors ⓘ |
| electrificationSystem | third rail ⓘ |
| gauge | standard gauge ⓘ |
| location | Amsterdam ⓘ |
| network | Amsterdam rapid transit network ⓘ |
| operatesOn |
Amsterdam Metro
ⓘ
linked to:
Amsterdam Metro network
|
| operator |
GVB
ⓘ
Gemeentelijk Vervoerbedrijf ⓘ |
| powerType | DC electric ⓘ |
| railwaySystem |
Amsterdam Metro Line 50
ⓘ
linked to:
Amsterdam Metro line 50
Amsterdam Metro Line 51 ⓘ
linked to:
Amsterdam Metro line 51
Amsterdam Metro Line 53 ⓘ
linked to:
Amsterdam Metro line 53
Amsterdam Metro Line 54 ⓘ
linked to:
Amsterdam Metro line 54
|
| regionServed | Randstad metropolitan region ⓘ |
| serviceType |
rapid transit
ⓘ
urban rail ⓘ |
| trackUsage | dedicated metro tracks ⓘ |
| traction | electric ⓘ |
| usedFor | passenger transport ⓘ |
| usedIn | public transport in Amsterdam ⓘ |
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: Amsterdam Metro M4 series Description of subject: The Amsterdam Metro M4 series is a generation of electric multiple-unit metro trains that operate on Amsterdam’s rapid transit network.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.