21607
This testing site for the soviet missile defense system was one of such centers , which had led to construction of anti-ballistic missile s and to attain parity in the arms race between the USSR and USA .
 location: USSR; location: USA
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: USSR, USA 
Answer:
 location: USSR; location: USA