20070
His life 's work amounted not only to hundreds of articles and twenty-three books , among them The Conflict of the Church and the Synagogue ( 1934 ) , his magnum opus , but also to social activism .
 None
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:  
Answer:
 None