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He also learned to imitate Spencer Chamberlain 's ( singer of Underoath ) screamed vocal technique .
 person: Spencer Chamberlain; organization: Underoath
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: Spencer Chamberlain; organization: Underoath