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Margaret Daum ( March 25 , 1906 – February 23 , 1977 ) was an American classical soprano .
 person: Margaret Daum
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Margaret Daum 
Answer:
 person: Margaret Daum