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In later machines the lower-level instruction set was an extended version of the PowerPC instruction set , which evolved from John Cocke 's RISC machine .
 person: John Cocke
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: John Cocke