Premodifier: rio
Head noun: negro

Same concepts
http://dbpedia.org/resource/Rio_Negro

Broader concepts

labelprovenanceconfidence
blackwater riverisap:3670800250.588666
tributary of the amazonisap:3365606820.535176
riverisap:3670800260.513469
largest riverisap:3670800270.217988

Narrower concepts

labelprovenanceconfidence