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Career with Sonic While still CEO of Fleming , Werries was elected to the Board of Directors for Sonic Drive-In in 1991 .
 Sonic, Fleming, Werries, Sonic Drive-In
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sonic, Fleming, Werries, Sonic Drive-In