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In 1981 , Orange County native Bruce Penhall won his first Speedway World Championship , becoming the first American do to so since Jack Milne in 1937 .
 location: Orange County; person: Bruce Penhall; person: Jack Milne
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: Orange County, Bruce Penhall, Jack Milne 
Answer:
 location: Orange County; person: Bruce Penhall; person: Jack Milne