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In January 1989 , he was hired by Kraft 's father , then - Foxboro Stadium owner Robert Kraft , as the chief operating officer of Foxboro Stadium Associates .
 Kraft, Robert Kraft
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kraft, Robert Kraft