9794
He approached music through his parents ' collection , listening to Black Sabbath ( regarded by him as his first influence ) and Deep Purple .
 organization: Black Sabbath; organization: Deep Purple
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: Black Sabbath, Deep Purple 
Answer:
 organization: Black Sabbath; organization: Deep Purple