12823
The American diplomat arrived in Belgrade two days after international organisers postponed municipal elections in Bosnia due to irregularities in the registration of Serb refugee voters .
 location: Belgrade; else: Serb; else: American; location: Bosnia
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
 Entities: Belgrade, Serb, American, Bosnia 
Answer:
 location: Belgrade; else: Serb; else: American; location: Bosnia