503
Alex O'Brien ( U.S. ) beat Byron Black ( Zimbabwe ) 7-6 ( 7-2 ) 6-2
 person: Alex O'Brien; person: Byron Black; location: Zimbabwe; location: U.S.
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: Alex O'Brien, Byron Black, Zimbabwe, U.S. 
Answer:
 person: Alex O'Brien; person: Byron Black; location: Zimbabwe; location: U.S.