61422
Karachi has the largest population of water buffaloes for an area where fodder is not grown , consisting of 350,000 head kept mainly for milking .
 location: Karachi
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: Karachi 
Answer:
 location: Karachi