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Giants in the Earth ( Norwegian : Verdens Grøde ) is a novel by Norwegian-American author Ole Edvart Rølvaag .
 person: Ole Edvart Rølvaag
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: Ole Edvart Rølvaag 
Answer:
 person: Ole Edvart Rølvaag