A21 motorway
E669556
The A21 motorway is a major Italian autostrada in northern Italy that connects Turin with Brescia, passing through cities such as Piacenza.
All labels observed (1)
| Label | Occurrences |
|---|---|
| A21 motorway canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4572697 — 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: A21 motorway Context triple: [Piacenza, roadJunctionOf, A21 motorway]
-
A.
A22 motorway
The A22 motorway, also known as Via do Infante, is a major east–west toll highway in Portugal’s Algarve region that links coastal towns and connects to Spain.
-
B.
A20 motorway
The A20 motorway is a major French highway running north–south through central and southwestern France, linking cities such as Vierzon, Limoges, and Toulouse.
-
C.
A28 motorway
The A28 motorway is a major German autobahn in northwestern Germany that connects the city of Oldenburg with other regional and national transport routes.
-
D.
A25 motorway
The A25 motorway is a major Italian highway in central Italy that connects the Adriatic coast near Pescara with the A24 route toward Rome, facilitating east–west travel across the Apennines.
-
E.
A12 motorway
The A12 motorway is a major Italian highway running along the Ligurian and Tyrrhenian coasts, linking key coastal cities and serving as an important route for regional and long-distance traffic.
- 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: A21 motorway Target entity description: The A21 motorway is a major Italian autostrada in northern Italy that connects Turin with Brescia, passing through cities such as Piacenza.
-
A.
A22 motorway
The A22 motorway, also known as Via do Infante, is a major east–west toll highway in Portugal’s Algarve region that links coastal towns and connects to Spain.
-
B.
A20 motorway
The A20 motorway is a major French highway running north–south through central and southwestern France, linking cities such as Vierzon, Limoges, and Toulouse.
-
C.
A28 motorway
The A28 motorway is a major German autobahn in northwestern Germany that connects the city of Oldenburg with other regional and national transport routes.
-
D.
A25 motorway
The A25 motorway is a major Italian highway in central Italy that connects the Adriatic coast near Pescara with the A24 route toward Rome, facilitating east–west travel across the Apennines.
-
E.
A12 motorway
The A12 motorway is a major Italian highway running along the Ligurian and Tyrrhenian coasts, linking key coastal cities and serving as an important route for regional and long-distance traffic.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
Italian autostrada
ⓘ
motorway ⓘ |
| accessControl | controlled-access highway ⓘ |
| connects |
Brescia
ⓘ
Turin ⓘ |
| country | Italy ⓘ |
| endPoint | Brescia ⓘ |
| hasAbbreviation | A21 ⓘ |
| hasCategory |
Motorways in Italy
ⓘ
Transport in Emilia-Romagna ⓘ Transport in Lombardy ⓘ Transport in Piedmont ⓘ |
| hasJunctionWith |
A1 motorway
ⓘ
A26 motorway ⓘ A4 motorway ⓘ A7 motorway ⓘ |
| hasRouteType | autostrada ⓘ |
| languageOfName | Italian ⓘ |
| locatedIn |
northern Italy
ⓘ
linked to:
Northern Italy
|
| locatedInRegion |
Emilia-Romagna
ⓘ
Lombardy ⓘ Piedmont ⓘ |
| partOfNetwork | Italian motorway network ⓘ |
| passesNear |
Alessandria
ⓘ
Asti ⓘ Cremona ⓘ |
| passesThrough | Piacenza ⓘ |
| roadNumber | A21 ⓘ |
| roadType | dual carriageway ⓘ |
| startPoint | Turin ⓘ |
| toll | yes ⓘ |
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: A21 motorway Description of subject: The A21 motorway is a major Italian autostrada in northern Italy that connects Turin with Brescia, passing through cities such as Piacenza.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.