But Burger King Restaurants of Canada is using a discovery of the deadly disease , called bovine spongiform encephalopathy , in an Alberta cow two years ago and the subsequent ban on Canadian beef exports to the United States to promote a special '' 100 percent Canadian beef '' version of its Whopper hamburger .
Canada
Alberta
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Canada
Alberta
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Alberta
Canada
/location/administrative_division/country
LOCATION
Canada
LOCATION
Alberta
LOCATION
United States