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Venice 's long decline started in the 15th century , when it first made an unsuccessful attempt to hold Thessalonica against the Ottomans when they started to attack ( 1423 – 1430 ) .
 location: Venice; location: Thessalonica; location: Ottomans
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Venice, Thessalonica, Ottomans 
Answer:
 location: Venice; location: Thessalonica; location: Ottomans