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He 's learned as much from Mina Loy , Robert Duncan , and Tom McGrath as he has from Thom Gunn , Thomas Hardy , and George Herbert .
 Mina Loy, Robert Duncan, Tom McGrath, Thom Gunn, Thomas Hardy, George Herbert
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mina Loy, Robert Duncan, Tom McGrath, Thom Gunn, Thomas Hardy, George Herbert