14101
Most of the central and lower sections of the river flow through the Purus várzea ecoregion .
 location: Purus
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: Purus 
Answer:
 location: Purus