26196
The conference which ultimately declared itself the Founding Congress of the Communist International was postponed to March 2 , 1919 , owing to the difficulties entailed by foreign delegates in crossing the blockade of Soviet Russia established by the Allied Nations at the end of World War I .
 organization: Communist; location: Russia
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: Communist, Russia 
Answer:
 organization: Communist; location: Russia