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Unusually , Ayler plays alto rather than his usual tenor on the opening track , a tribute to Coltrane , who was present when the two tracks on side two of the album were recorded .
 Ayler, Coltrane
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ayler, Coltrane