54745
It was conceived as an external appendage of the Soviet Union 's secret police forces and gained an indigenous reputation for brutality during a series of purges beginning in 1948 , intensifying in 1949 and ending in 1953 .
 location: Soviet Union
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: Soviet Union 
Answer:
 location: Soviet Union