Kilometer Zero plaque
E143698
The Kilometer Zero plaque is a symbolic marker in Madrid that designates the point from which Spain’s six national radial roads are measured.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Kilometer Zero plaque canonical | 3 |
| Kilometre zero | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1253072 — 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: Kilometer Zero plaque Context triple: [Puerta del Sol, hasFeature, Kilometer Zero plaque]
-
A.
Millennium Monument
The Millennium Monument is a semicircular, neoclassical colonnade in Chicago’s Millennium Park that serves as a modern replica of the city’s original 1917 peristyle.
-
B.
Astoria Column
The Astoria Column is a historic tower in Astoria, Oregon, famed for its spiral murals depicting regional history and its panoramic views over the Columbia River and surrounding landscape.
-
C.
Motherland Monument
The Motherland Monument is a towering Soviet-era stainless steel statue in Kyiv that commemorates the Soviet victory in World War II and has become one of the city's most recognizable symbols.
-
D.
Vatican Obelisk
The Vatican Obelisk is an ancient Egyptian granite obelisk now standing at the center of St. Peter’s Square in Vatican City, serving as a prominent historical and religious landmark.
-
E.
Pioneer Monument
Pioneer Monument is a historic memorial near Donner Lake in California commemorating the ill-fated Donner Party and early western pioneers.
- 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: Kilometer Zero plaque Target entity description: The Kilometer Zero plaque is a symbolic marker in Madrid that designates the point from which Spain’s six national radial roads are measured.
-
A.
Millennium Monument
The Millennium Monument is a semicircular, neoclassical colonnade in Chicago’s Millennium Park that serves as a modern replica of the city’s original 1917 peristyle.
-
B.
Astoria Column
The Astoria Column is a historic tower in Astoria, Oregon, famed for its spiral murals depicting regional history and its panoramic views over the Columbia River and surrounding landscape.
-
C.
Motherland Monument
The Motherland Monument is a towering Soviet-era stainless steel statue in Kyiv that commemorates the Soviet victory in World War II and has become one of the city's most recognizable symbols.
-
D.
Vatican Obelisk
The Vatican Obelisk is an ancient Egyptian granite obelisk now standing at the center of St. Peter’s Square in Vatican City, serving as a prominent historical and religious landmark.
-
E.
Pioneer Monument
Pioneer Monument is a historic memorial near Donner Lake in California commemorating the ill-fated Donner Party and early western pioneers.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
geodetic reference point
ⓘ
plaque ⓘ tourist attraction ⓘ |
| coordinateSystemRole | origin point for road kilometer markers ⓘ |
| country | Spain ⓘ |
| hasInscription |
reference to national roads
ⓘ
“Km. 0” ⓘ |
| hasLanguage | Spanish ⓘ |
| hasNearbyLandmark |
Puerta del Sol square
ⓘ
linked to:
Puerta del Sol
Real Casa de Correos ⓘ
linked to:
Casa de Correos building
|
| hasWritingSystem | Latin alphabet ⓘ |
| heritageStatus | local landmark ⓘ |
| locatedIn |
Madrid
ⓘ
Puerta del Sol ⓘ |
| locatedInAdministrativeTerritory |
Community of Madrid
ⓘ
Spain ⓘ |
| locatedOn | ground ⓘ |
| material |
metal
ⓘ
stone ⓘ |
| numberOfRadialRoadsMeasured | 6 ⓘ |
| partOf | Spanish road distance measurement system ⓘ |
| roadNetwork | Spanish national radial roads ⓘ |
| significance |
starting point of Spain’s six national radial roads
ⓘ
symbolic center of Spain’s radial road network ⓘ |
| symbolizes |
beginning of major routes from Madrid to rest of Spain
ⓘ
centrality of Madrid in Spanish road network ⓘ |
| touristActivity | photography spot ⓘ |
| use | reference point for measuring road distances ⓘ |
| usedBy |
Spanish road authorities
ⓘ
tourists ⓘ travelers ⓘ |
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: Kilometer Zero plaque Description of subject: The Kilometer Zero plaque is a symbolic marker in Madrid that designates the point from which Spain’s six national radial roads are measured.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.