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The singles Bing Crosby 's " White Christmas " and Tennessee Ernie Ford 's " Sixteen Tons " had surpassed 1 million copies previously .
 person: Bing Crosby; person: Tennessee Ernie Ford
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: Bing Crosby; person: Tennessee Ernie Ford