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Walter Albright " Wally " Niemann ( April 21 , 1894 – December 5 , 1967 ) was an American football player .
 person: Walter; person: Niemann
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: Walter, Niemann 
Answer:
 person: Walter; person: Niemann