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officials say they capped one blaze , leaving only two wells still burning out of 500 oil fields in the area .
 officials, they, two wells, 500 oil fields in the area, the area
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 officials, they, two wells, 500 oil fields in the area, the area