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He duetted with some of the biggest solo singing stars of his time , including Bing Crosby , Ella Fitzgerald and Louis Armstrong .
 person: Bing Crosby; person: Ella Fitzgerald; person: Louis Armstrong
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: Ella Fitzgerald; person: Louis Armstrong