203080
Example For example , in industries like gasoline refining , distribution , and retail ; it is possible to argue that a vertically-integrated refiner reduces competition through practices that constrain supply to retailers outside its network of related firms .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None