4807
These cities were Calgary , Charlottetown , Edmonton , Halifax , Hamilton , Ottawa , Prince Rupert , Quebec City , Regina , Saint John , Saskatoon and Vancouver .
 Calgary, Charlottetown, Edmonton, Halifax, Hamilton, Ottawa, Prince Rupert, Quebec City, Regina, Saint John, Saskatoon, Vancouver
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Calgary, Charlottetown, Edmonton, Halifax, Hamilton, Ottawa, Prince Rupert, Quebec City, Regina, Saint John, Saskatoon, Vancouver