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. {{USERNAME}} is so obsessed with oil I 'm worried he 's going to sharpie up a map to prove that Alberta is a part of Montana . Perhaps WE should put up a wall .
 Alberta, Montana
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: group, creative work, person, event, product, location, corporation 
Text: {0} 
Answer:
 Alberta, Montana