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It appeared on all live albums recorded after its release , with the longest version ( on the album Fleetwood Mac : Live in Boston ) clocking in at 9:39 , making it the longest officially released version of a Fleetwood Mac song following the Peter Green era , and the fourth longest overall .
 Peter Green
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Peter Green