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Demonaz played guitar on the albums " Diabolical Fullmoon Mysticism " , " Pure Holocaust " and " Battles in the North " , with his last musical contribution to Immortal being the 1997 album " Blizzard Beasts " .
 person: Demonaz; organization: Immortal
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: Demonaz; organization: Immortal