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On the 22nd , the sixteen NATO countries asked the armed forces of the Serbian people of Bosnia - Herzegovina to withdraw to a place 3 kilometers away from Gerlaridy city before 0 : 00 on April 24th ( Greenwich Mean Time ) , and to guarantee that United Nations humanitarian aid would go unblocked and unhindered , otherwise NATO would begin air strikes against the Serbian army .
 geographical social political: the sixteen NATO countries; geographical social political: Bosnia - Herzegovina; geographical social political: Gerlaridy city; geographical social political: Serbian; organization: NATO; organization: the armed forces of the Serbian people of Bosnia - Herzegovina; organization: United Nations; organization: NATO; organization: the Serbian army; person: the Serbian people of Bosnia - Herzegovina; person: Serbian; person: United Nations humanitarian aid; location: a place 3 kilometers away from Gerlaridy city before 0 : 00 on April 24th ( Greenwich Mean Time
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 geographical social political: the sixteen NATO countries; geographical social political: Bosnia - Herzegovina; geographical social political: Gerlaridy city; geographical social political: Serbian; organization: NATO; organization: the armed forces of the Serbian people of Bosnia - Herzegovina; organization: United Nations; organization: NATO; organization: the Serbian army; person: the Serbian people of Bosnia - Herzegovina; person: Serbian; person: United Nations humanitarian aid; location: a place 3 kilometers away from Gerlaridy city before 0 : 00 on April 24th ( Greenwich Mean Time