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The album also featured guest appearances from Gillan bassist John McCoy , Chris Caffery of Savatage and Trans-Siberian Orchestra , John West on vocals and Mike Sciotto on drums .
 John McCoy, Chris Caffery, Mike
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 John McCoy, Chris Caffery, Mike