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He is known for his baritone voice , which has been described as being " as scratchy as a three-day beard yet as supple and pliable as moccasin leather " and has been compared to Leonard Cohen and Tom Waits .
 person: Leonard Cohen; person: Tom Waits
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Leonard Cohen; person: Tom Waits