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In Ontario and the prairie western provinces of Canada , as well as parts of the Midwest and West in the US , such a round jelly - or custard-filled doughnut is commonly called a " bismark " or " bismarck " ( after Otto von Bismarck ) , while a filled bar doughnut is called a " long john " , and usually contains pastry cream , custard , or whipped cream , but can also contain a jelly filling .
 Ontario, Canada, Midwest, West, US, Otto von Bismarck
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ontario, Canada, Midwest, West, US, Otto von Bismarck