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However , as posited in the novelisation of the television movie by Gary Russell , the Master 's self-alterations to extend his lifespan allow him to survive his execution by transferring his mind into a snake-like entity called a " morphant " .
 person: Gary Russell
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: Gary Russell