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Marcus Hutter 's universal artificial intelligence builds upon Solomonoff 's mathematical formalization of the razor to calculate the expected value of an action .
 Marcus Hutter, Solomonoff
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Marcus Hutter, Solomonoff