62705
Otto Schreier published an algebraic proof of this result in 1927 , and Kurt Reidemeister included a comprehensive treatment of free groups in his 1932 book on combinatorial topology .
 person: Otto Schreier; person: Kurt Reidemeister
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: Otto Schreier, Kurt Reidemeister 
Answer:
 person: Otto Schreier; person: Kurt Reidemeister