Madeira River
E112120
The Madeira River is one of the largest and most significant rivers in South America, flowing through Bolivia and Brazil and playing a key role in the Amazon Basin’s ecology, transport, and hydroelectric power generation.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Madeira River canonical | 11 |
| Madeira River basin | 2 |
| Madeira River system | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T790206 — 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: Madeira River Context triple: [Amazon River, majorTributary, Madeira River]
-
A.
Carioca River
The Carioca River is a small urban waterway in Rio de Janeiro, Brazil, historically important as a source of fresh water for the city and now known for running through the Tijuca Forest and into Guanabara Bay.
-
B.
Gilão River
The Gilão River is a waterway in Portugal’s Algarve region that flows through the historic town of Tavira before reaching the Atlantic Ocean.
-
C.
Santa Catarina River
The Santa Catarina River is a seasonal river in northeastern Mexico that runs through the city of Monterrey and is known for its dramatic floods and role in shaping the urban landscape.
-
D.
Rio Hato
Rio Hato is a coastal area in Panama known for its airfield, which was a key target during the U.S. invasion of Panama in Operation Just Cause.
-
E.
Caroni River
The Caroni River is a significant river in southeastern Venezuela known for its hydroelectric potential and for flowing through the Guayana region before joining the Orinoco.
- 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: Madeira River Target entity description: The Madeira River is one of the largest and most significant rivers in South America, flowing through Bolivia and Brazil and playing a key role in the Amazon Basin’s ecology, transport, and hydroelectric power generation.
-
A.
Carioca River
The Carioca River is a small urban waterway in Rio de Janeiro, Brazil, historically important as a source of fresh water for the city and now known for running through the Tijuca Forest and into Guanabara Bay.
-
B.
Gilão River
The Gilão River is a waterway in Portugal’s Algarve region that flows through the historic town of Tavira before reaching the Atlantic Ocean.
-
C.
Santa Catarina River
The Santa Catarina River is a seasonal river in northeastern Mexico that runs through the city of Monterrey and is known for its dramatic floods and role in shaping the urban landscape.
-
D.
Rio Hato
Rio Hato is a coastal area in Panama known for its airfield, which was a key target during the U.S. invasion of Panama in Operation Just Cause.
-
E.
Caroni River
The Caroni River is a significant river in southeastern Venezuela known for its hydroelectric potential and for flowing through the Guayana region before joining the Orinoco.
- F. None of above. chosen
Statements (61)
| Predicate | Object |
|---|---|
| instanceOf |
river
ⓘ
tributary of the Amazon River ⓘ |
| averageDischarge |
among the largest in the world
ⓘ
approximately 31,200 cubic meters per second ⓘ |
| basinSize | approximately 1,420,000 square kilometers ⓘ |
| biodiversity | high aquatic biodiversity ⓘ |
| cityOnRiver |
Guajará-Mirim
ⓘ
Humaitá ⓘ Manicoré ⓘ Nova Mamoré ⓘ Porto Velho ⓘ |
| climateZone | tropical ⓘ |
| containsSpecies |
catfish
ⓘ
many migratory fish species ⓘ piranhas ⓘ river dolphins ⓘ |
| continent | South America ⓘ |
| country |
Bolivia
ⓘ
Brazil ⓘ |
| damLocation | near Porto Velho, Rondônia ⓘ |
| ecoregion | Amazon rainforest ⓘ |
| environmentalIssue |
deforestation in its basin
ⓘ
flooding of forests by reservoirs ⓘ impacts of dams on fish migration ⓘ |
| etymology | named for the large amount of floating wood (madeira) observed by early explorers ⓘ |
| flowsThrough |
Amazonas
ⓘ
surface form:
Amazonas (Brazilian state)
Beni Department ⓘ Pando Department ⓘ Rondônia ⓘ border between Bolivia and Brazil ⓘ |
| formsBorderBetween |
Bolivia
ⓘ
Brazil ⓘ |
| hasDam |
Jirau Dam
ⓘ
Santo Antônio Dam ⓘ |
| length |
approximately 2,050 miles
ⓘ
approximately 3,300 km ⓘ |
| locatedIn | western Amazon ⓘ |
| majorUse |
agricultural product transport
ⓘ
fisheries ⓘ hydroelectric power generation ⓘ inland water transport ⓘ timber transport ⓘ |
| mouth | Amazon River ⓘ |
| mouthLocation | near Itacoatiara, Amazonas, Brazil ⓘ |
| nameLanguage |
Portuguese language
ⓘ
surface form:
Portuguese
|
| navigability | partially navigable ⓘ |
| obstacleToNavigation | rapids and waterfalls in upper reaches ⓘ |
| partOf | Amazon Basin ⓘ |
| roleInAmazon | major contributor of water and sediments to the Amazon River ⓘ |
| sedimentLoad | very high ⓘ |
| sourceCountry |
Bolivia
ⓘ
Brazil ⓘ |
| sourceRegion | Andes ⓘ |
| tributary |
Abunã River
ⓘ
Aripuanã River ⓘ Beni River ⓘ Guaporé River ⓘ Jamari River ⓘ Ji-Paraná River ⓘ Mamoré River ⓘ Manicoré River ⓘ |
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: Madeira River Description of subject: The Madeira River is one of the largest and most significant rivers in South America, flowing through Bolivia and Brazil and playing a key role in the Amazon Basin’s ecology, transport, and hydroelectric power generation.
Referenced by (15)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Madeira River basin
this entity surface form:
Madeira River basin
this entity surface form:
Madeira River system
this entity surface form:
Madeira River system