222553
In 1940 , following the Molotov-Ribbentrop Treaty , Basarabia again is busy this time of USSR .
 location: USSR
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 
Answer:
 location: USSR