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Although the city is facing some challenges ( including an excessive number of tourists and problems caused by pollution , tide peaks and cruise ships sailing too close to buildings ) , Venice remains a very popular tourist destination , a major cultural centre , and has been ranked many times the most beautiful city in the world .
 Venice
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Venice