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He , along with Bill Kelliher and Brent Hinds of Mastodon , designed a nine-stringed double-cutaway solid-body guitar , made of mahogany and maple .
 person: Bill Kelliher; person: Brent Hinds; organization: Mastodon
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: Bill Kelliher; person: Brent Hinds; organization: Mastodon