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London is best known for his compositions for Chicago blues artists Howlin ' Wolf , Muddy Waters , Elmore James , and Junior Wells as well as being the record producer and owner of Chief Records ( and its Profile Records and Age Records subsidiaries ) .
 person: Howlin ' Wolf; person: Muddy Waters; person: Elmore James; person: Junior Wells; organization: Chief Records
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Howlin ' Wolf; person: Muddy Waters; person: Elmore James; person: Junior Wells; organization: Chief Records