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The album marks the return of long-time Soilwork guitarist and founder Peter Wichers , who also picks up the role as the album 's producer , though Wichers would leave Soilwork again in 2012 .
 Peter Wichers, Wichers
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Peter Wichers, Wichers