56023
A number of cities , such as Sarajevo and Mostar , were established and grew into regional centers of trade and urban culture and were then visited by Ottoman traveler Evliya Çelebi in 1648 .
 Sarajevo, Mostar, Ottoman, Evliya Çelebi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sarajevo, Mostar, Ottoman, Evliya Çelebi