90561
He has performed and recorded with such artists as Roy Orbison , Elvis Presley , Emmylou Harris , John Denver , and Ricky Nelson .
 Roy Orbison, Elvis Presley, Emmylou Harris, John Denver, Ricky Nelson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Roy Orbison, Elvis Presley, Emmylou Harris, John Denver, Ricky Nelson