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Madeleine Williams ( born 28 March 1983 at Rocky Mountain House , Alberta ) is a Canadian cross-country skier who has competed since 2001 .
 Madeleine Williams, Rocky Mountain House , Alberta, Canadian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Madeleine Williams, Rocky Mountain House , Alberta, Canadian