67798
The city stands at an important junction connecting the south of the Adriatic Sea region with the Aegean Sea and Central Europe , and is an administrative , cultural , industrial , commercial , and educational centre .
 Adriatic Sea, Aegean Sea, Central Europe
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Adriatic Sea, Aegean Sea, Central Europe