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Mater 's driving skills include a claim to be " the world 's best backwards driver , " an ability picked up from none other than Dean Walker , a Kansas Historic Route 66 Association president known in Riverton as " Crazy Legs Walker , the Ambassador of Crazy Feet on Route 66 " for his ability to twist his feet backward and walk in reverse .
 Kansas Historic Route 66 Association, Riverton, Route 66
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kansas Historic Route 66 Association, Riverton, Route 66