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'' Margaret '' ' ( 23 February 1416 – 20 May 1444 ) , married first William III , Duke of Bavaria on 11 May 1433 , second Ulrich V , Count of Württemberg on 29 January 1441
 Margaret, William III , Duke of Bavaria, Ulrich V , Count of Württemberg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Margaret, William III , Duke of Bavaria, Ulrich V , Count of Württemberg