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The band 's composition varied slightly , but the main members were Mats Zetterberg , vocals , Harry Schiffman , guitar , Mats Bäcker , saxophone , Peter Kempinsky , guitar , Ulf Karlberg , bass , Ingvar " Krupa " Nilsson , drums , and Karl G. Jönsson , texts and design .
 None
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:  
Answer:
 None