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Career Schreiner finished his secondary education in 1921 , and enrolled at the University of Oslo where he majored in history in 1927 .
 Schreiner, University of Oslo
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Schreiner, University of Oslo