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" Sphere " is a 1987 novel by Michael Crichton , his sixth novel under his own name and his sixteenth overall .
 person: Michael Crichton
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Michael Crichton