13800
Negotiated by the then-members of NATO and the Warsaw Pact , the agreement was signed in Helsinki , Finland , on March 24 , 1992 .
 organization: NATO; organization: Warsaw Pact; location: Helsinki; location: Finland
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: NATO, Warsaw Pact, Helsinki, Finland 
Answer:
 organization: NATO; organization: Warsaw Pact; location: Helsinki; location: Finland