12084
When he fled from Milan to Venice in 1499 , he found employment as an engineer and devised a system of moveable barricades to protect the city from attack .
 location: Milan; location: Venice
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: Milan, Venice 
Answer:
 location: Milan; location: Venice