Madrid basin
E797694
The Madrid basin is a large sedimentary basin in central Spain that underlies and surrounds the city of Madrid, forming a key part of the region’s geological and geographic landscape.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Madrid (region along Tagus) | 1 |
| Madrid basin canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9257946 — 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: Madrid basin Context triple: [Southern Submeseta, contains, Madrid basin]
-
A.
Llobregat basin
The Llobregat basin is a river drainage basin in Catalonia, Spain, centered on the Llobregat River and encompassing a range of towns and agricultural and industrial areas before the river reaches the Mediterranean Sea.
-
B.
Tagus Basin
The Tagus Basin is the extensive river basin encompassing the catchment area of the Tagus River across central Spain and Portugal, supporting major cities, agriculture, and hydroelectric infrastructure.
-
C.
Ebro basin
The Ebro basin is a major river drainage region in northeastern Spain, encompassing the catchment area of the Ebro River and its tributaries across the Pyrenees and surrounding plains.
-
D.
Madrid metropolitan area
The Madrid metropolitan area is the large urban and economic region centered on Spain’s capital city, encompassing Madrid and its surrounding municipalities and suburbs.
-
E.
Guadiana Basin
The Guadiana Basin is a major river basin of the Iberian Peninsula, draining parts of central and southwestern Spain and Portugal through the course of the Guadiana River.
- 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: Madrid basin Target entity description: The Madrid basin is a large sedimentary basin in central Spain that underlies and surrounds the city of Madrid, forming a key part of the region’s geological and geographic landscape.
-
A.
Llobregat basin
The Llobregat basin is a river drainage basin in Catalonia, Spain, centered on the Llobregat River and encompassing a range of towns and agricultural and industrial areas before the river reaches the Mediterranean Sea.
-
B.
Tagus Basin
The Tagus Basin is the extensive river basin encompassing the catchment area of the Tagus River across central Spain and Portugal, supporting major cities, agriculture, and hydroelectric infrastructure.
-
C.
Ebro basin
The Ebro basin is a major river drainage region in northeastern Spain, encompassing the catchment area of the Ebro River and its tributaries across the Pyrenees and surrounding plains.
-
D.
Madrid metropolitan area
The Madrid metropolitan area is the large urban and economic region centered on Spain’s capital city, encompassing Madrid and its surrounding municipalities and suburbs.
-
E.
Guadiana Basin
The Guadiana Basin is a major river basin of the Iberian Peninsula, draining parts of central and southwestern Spain and Portugal through the course of the Guadiana River.
- F. None of above. chosen
Statements (35)
| Predicate | Object |
|---|---|
| instanceOf |
geological region
ⓘ
sedimentary basin ⓘ |
| boundedBy |
Central System
ⓘ
Iberian Range ⓘ
linked to:
Cordillera Ibérica
Toledo Mountains ⓘ |
| contains |
Cenozoic sedimentary rocks
ⓘ
alluvial deposits ⓘ fluvial sediments ⓘ lacustrine sediments ⓘ |
| country | Spain ⓘ |
| drainedBy |
Jarama River
ⓘ
Manzanares River ⓘ Tagus River ⓘ |
| formedBy | tectonic subsidence ⓘ |
| formedDuring | Tertiary period ⓘ |
| geologicalAge | Cenozoic ⓘ |
| hasClimateContext | Mediterranean continental climate zone ⓘ |
| hasEconomicUse |
construction materials source
ⓘ
groundwater resource ⓘ |
| influences |
hydrogeology of Madrid region
ⓘ
soil characteristics of Madrid region ⓘ topography of Madrid region ⓘ |
| isStudiedIn |
engineering geology
ⓘ
hydrogeology ⓘ sedimentary basin analysis ⓘ |
| lithology |
clay
ⓘ
conglomerate ⓘ limestone ⓘ sandstone ⓘ |
| locatedIn | central Spain ⓘ |
| overlies | Paleozoic basement rocks ⓘ |
| partOf |
Iberian Peninsula
ⓘ
Spanish interior basins ⓘ |
| surrounds |
city of Madrid
ⓘ
linked to:
Madrid
|
| underlies | city of Madrid ⓘ |
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: Madrid basin Description of subject: The Madrid basin is a large sedimentary basin in central Spain that underlies and surrounds the city of Madrid, forming a key part of the region’s geological and geographic landscape.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Madrid basin