6396
Performing as a solid back , it did n't last long until he gained head coach Dragan Okuka 's trust and became a starter .
 Dragan Okuka
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:
 Dragan Okuka