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In the country music field , singer-songwriters like Hank Williams , Patsy Cline , Tammy Wynette , Loretta Lynn , George Jones , Merle Haggard , Roger Miller , Billy Edd Wheeler , and others emerged from the 1940 s through the 1960 s , often writing compelling songs about love relationships and other subjects .
 Hank Williams, Patsy Cline, Tammy Wynette, Loretta Lynn, George Jones, Merle Haggard, Roger Miller, Billy Edd Wheeler
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:
 Hank Williams, Patsy Cline, Tammy Wynette, Loretta Lynn, George Jones, Merle Haggard, Roger Miller, Billy Edd Wheeler