316893
He wrote also a survey in 10 parts on Finlands history : Suomen Kansan aikakirjat ( 1927 – 38 ) , were he popularised the results of the historical research .
 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