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Until 1936 he served as president of the German Society for Musicology ( until 1933 the German Music Society ) , which was transformed according to Nazi principles : " The employment of young Nazis was encouraged , but Alfred Einstein ( 1880-1952 ) was forced to resign from the editorship of the Journal of Musicology which he had lead since its first appearance in 1918 .
 person: Alfred Einstein
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: Alfred Einstein 
Answer:
 person: Alfred Einstein