230295
All of Canada 's Forbes 2000 oil and gas companies are headquartered in Calgary , Alberta ( including smaller ones 2,412 oil and gas companies are based in Calgary ) .
 Forbes, Calgary, Alberta, Calgary
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Forbes, Calgary, Alberta, Calgary