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On 31 May 2016 , according to Immortal 's official Facebook page , Demonaz was officially announced as the band 's new lead singer following the departure of Abbath in 2015 .
 organization: Immortal; person: Demonaz; person: Abbath
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:
 organization: Immortal; person: Demonaz; person: Abbath