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The two first recipients of the senior Sverdrup Prize have been Dag Tjøstheim ( 2009 ) and Tore Schweder ( 2011 ) .
 Dag Tjøstheim, Tore Schweder
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Dag Tjøstheim, Tore Schweder