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In January 2015 , FIFPro said that the current transfer window system is " failing football and its players " , one of the main issues being that players are released from clubs without explanation or compensation .
 FIFPro
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:
 FIFPro