48559
Later on large cannon were known as bombards , ranging from three to five feet in length and were used by Dubrovnik and Kotor in defence during the later 14th century .
 Dubrovnik, Kotor
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:
 Dubrovnik, Kotor