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William IV of Bavaria ( ) ( 13 November 1493 – 7 March 1550 ) was Duke of Bavaria from 1508 to 1550 , until 1545 together with his younger brother Louis X , Duke of Bavaria .
 person: IV; person: Bavaria; person: Duke; person: Bavaria; person: Louis X , Duke of Bavaria
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: IV; person: Bavaria; person: Duke; person: Bavaria; person: Louis X , Duke of Bavaria