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He made his debut ten days later in a 1 – 3 home defeat by Crystal Palace by coming on as a 61st minute substitute for Alex Song , and was released at the end of the season .
 Crystal Palace, Alex Song
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:
 Crystal Palace, Alex Song