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He also produced discs for Johnny Cash , George Jones , Roy Orbison , Glen Campbell , Don Williams , Jesse Winchester and Linda Ronstadt .
 Johnny Cash, George Jones, Roy Orbison, Glen Campbell, Don Williams, Jesse Winchester, Linda Ronstadt
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Johnny Cash, George Jones, Roy Orbison, Glen Campbell, Don Williams, Jesse Winchester, Linda Ronstadt