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He was the school director of Oppland county from 1974 to 1981 , but had a leave of absence most of the period , as he served as the mayor of Lillehammer from 1975 to 1981 .
 Oppland, Lillehammer
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Oppland, Lillehammer