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During this time , he also spent three years as a DJ on BBC Radio 1 , playing soul and electro tracks and introducing some of the characters that he would later popularise on television .
 organization: BBC Radio 1
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: BBC Radio 1 
Answer:
 organization: BBC Radio 1