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Rick Stitch remained as singer through 2005 and in early 2006 , he left the band and joined Steady Ground ( featuring former The Offspring drummer Ron Welty ) as their singer .
 person: Rick Stitch; person: Ron Welty
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: Rick Stitch, Ron Welty 
Answer:
 person: Rick Stitch; person: Ron Welty