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In 1968 , 1937 Speedway World Champion Jack Milne and motorcycle enthusiast Harry Oxley teamed up to promote motorcycle racing at the Orange County Fairgrounds ( OC Fair & Event Center ) .
 person: Jack Milne; location: Orange
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: Jack Milne, Orange 
Answer:
 person: Jack Milne; location: Orange