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He came on as a late second-half substitute in a goalless draw with ČSK Čelarevo at home , thus breaking the record of Dejan Petković and becoming the youngest ever player in the club 's history .
 ČSK Čelarevo, Dejan Petković
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:
 ČSK Čelarevo, Dejan Petković