Noord/Zuidlijn
E491763
Noord/Zuidlijn is Amsterdam’s north–south metro line that connects the northern part of the city with the city center and southern districts via a major underground route.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Noord/Zuidlijn canonical | 5 |
| Noord–Zuidlijn | 2 |
| Noord–Zuidlijn project | 1 |
| North–South Line (Amsterdam Metro) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5079120 — 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: Noord/Zuidlijn Context triple: [Metro line 52, alsoKnownAs, Noord/Zuidlijn]
-
A.
Amstelveenlijn
Amstelveenlijn is a light rail corridor in the Amsterdam metropolitan area connecting the city with the suburb of Amstelveen.
-
B.
Nijmegen–Venlo railway
The Nijmegen–Venlo railway is a regional rail line in the Netherlands connecting the cities of Nijmegen and Venlo as part of the country’s passenger and freight rail network.
-
C.
Amsterdam–Utrecht railway
The Amsterdam–Utrecht railway is a major Dutch mainline rail route connecting Amsterdam with Utrecht and forming part of a key north–south transport corridor in the Netherlands.
-
D.
Amsterdam–Haarlem–Rotterdam railway
The Amsterdam–Haarlem–Rotterdam railway is one of the Netherlands’ oldest and most important mainline rail routes, connecting major cities in the Randstad region.
-
E.
Haarlem–Leiden railway
The Haarlem–Leiden railway is a historic rail line in the Netherlands that connects the cities of Haarlem and Leiden and serves several intermediate towns in the province of North Holland.
- 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: Noord/Zuidlijn Target entity description: Noord/Zuidlijn is Amsterdam’s north–south metro line that connects the northern part of the city with the city center and southern districts via a major underground route.
-
A.
Amstelveenlijn
Amstelveenlijn is a light rail corridor in the Amsterdam metropolitan area connecting the city with the suburb of Amstelveen.
-
B.
Nijmegen–Venlo railway
The Nijmegen–Venlo railway is a regional rail line in the Netherlands connecting the cities of Nijmegen and Venlo as part of the country’s passenger and freight rail network.
-
C.
Amsterdam–Utrecht railway
The Amsterdam–Utrecht railway is a major Dutch mainline rail route connecting Amsterdam with Utrecht and forming part of a key north–south transport corridor in the Netherlands.
-
D.
Amsterdam–Haarlem–Rotterdam railway
The Amsterdam–Haarlem–Rotterdam railway is one of the Netherlands’ oldest and most important mainline rail routes, connecting major cities in the Randstad region.
-
E.
Haarlem–Leiden railway
The Haarlem–Leiden railway is a historic rail line in the Netherlands that connects the cities of Haarlem and Leiden and serves several intermediate towns in the province of North Holland.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
metro line
ⓘ
public transport infrastructure ⓘ |
| connects |
Amsterdam city centre
ⓘ
linked to:
Amsterdam-Centrum
Amsterdam-Noord ⓘ
linked to:
Amsterdam North
southern districts of Amsterdam ⓘ |
| connectsTo |
Amsterdam Central railway station
ⓘ
linked to:
Amsterdam Centraal
Amsterdam Zuid railway station ⓘ
linked to:
Amsterdam Zuid station
other Amsterdam Metro lines at Amsterdam Centraal ⓘ other Amsterdam Metro lines at Amsterdam Zuid ⓘ |
| constructionStartDate | 2003 ⓘ |
| electrification | 750 V DC third rail ⓘ |
| faced |
construction delays
ⓘ
cost overruns ⓘ technical challenges in soft soil ⓘ |
| hasCharacter |
partly elevated
ⓘ
underground ⓘ |
| hasColorOnMap | blue ⓘ |
| hasConstructionCost | several billion euros ⓘ |
| hasDailyRidership | over 100000 passengers ⓘ |
| hasEnglishName | North–South Line ⓘ |
| hasLineNumber | 52 ⓘ |
| hasStation |
Centraal Station
ⓘ
linked to:
Amsterdam Centraal metro station
De Pijp ⓘ Europaplein ⓘ Noord ⓘ Noorderpark ⓘ Rokin ⓘ Vijzelgracht ⓘ Zuid ⓘ |
| hasTrackGauge | 1435 mm ⓘ |
| isKeyPartOf |
Amsterdam urban mobility network
ⓘ
linked to:
Amsterdam public transport network
|
| isMajorAxisFor | north–south travel in Amsterdam ⓘ |
| languageOfName | Dutch ⓘ |
| locatedIn |
Amsterdam
ⓘ
Netherlands ⓘ |
| openingDate | 2018-07-22 ⓘ |
| operatedBy | GVB ⓘ |
| ownedBy | Municipality of Amsterdam ⓘ |
| partOf |
Amsterdam Metro
ⓘ
linked to:
Amsterdam Metro network
|
| runsUnder |
IJ
ⓘ
historic city centre of Amsterdam ⓘ |
| servesArea |
Amsterdam city centre
ⓘ
linked to:
Amsterdam-Centrum
Amsterdam-Noord ⓘ
linked to:
Amsterdam North
Amsterdam-Zuid ⓘ
linked to:
Amsterdam Zuid
|
| terminusNorth | Noord metro station ⓘ |
| terminusSouth | Zuid metro station ⓘ |
| usesSignallingSystem | automatic train protection ⓘ |
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: Noord/Zuidlijn Description of subject: Noord/Zuidlijn is Amsterdam’s north–south metro line that connects the northern part of the city with the city center and southern districts via a major underground route.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Noord/Zuidlijn
linked to: Noord/Zuidlijn
linked to: Noord/Zuidlijn
linked to: Noord/Zuidlijn