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By 14 , he had begun to concentrate more on style than speed , as he began to popularize what is now referred to as freestyle BMX in shows for small , local audiences across the country .
 None
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:  
Answer:
 None