67137
The northern part of the river , known as the " Niger bend " , is an important area because it is the major river and source of water in that part of the Sahara desert .
 location: Niger; location: Sahara
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Niger, Sahara 
Answer:
 location: Niger; location: Sahara