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The song was written by Neil Innes and produced by Paul McCartney and Gus Dudgeon under the pseudonym " Apollo C. Vermouth " .
 Neil Innes, Paul McCartney, Gus Dudgeon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Neil Innes, Paul McCartney, Gus Dudgeon