25010
The surface of the country is diversified with undulating tracts and well-wooded hills , alternating with fertile valleys watered mainly by the Aare and its tributaries .
 location: Aare
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: Aare 
Answer:
 location: Aare