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In 1983 , he and Michael Weikath founded Helloween , where he was guitarist and singer until Michael Kiske took over the microphone for the albums " Keeper of the Seven Keys : Part I " and " Keeper of the Seven Keys : Part II " .
 person: Michael Weikath; organization: Helloween; person: Michael Kiske
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: Michael Weikath, Helloween, Michael Kiske 
Answer:
 person: Michael Weikath; organization: Helloween; person: Michael Kiske