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Jimmie Rodgers , Moon Mullican , Bob Wills , Bill Monroe and Hank Williams have all described themselves as blues singers and their music has a blues feel that is different , at first glance at least , from the later country pop of artists like Eddy Arnold .
 Jimmie Rodgers, Moon Mullican, Bob Wills, Bill Monroe, Hank Williams, Eddy Arnold
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:
 Jimmie Rodgers, Moon Mullican, Bob Wills, Bill Monroe, Hank Williams, Eddy Arnold