32255
These powers had perceived , understood and increasingly followed the imperative of controlling the lower Mekong basin as the key to control all Indochina .
 location: Mekong; location: Indochina
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: Mekong, Indochina 
Answer:
 location: Mekong; location: Indochina