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-DOCSTART- RT @united : .@IAH is now closed until noon on Thursday . Visit https://t.co/MKesTltbqy for status and rebooking . Travel Waiver : https://t.co/gAjiWabCD6 https://t.co/WrbC6mPOgQ
 .@IAH
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: exact location, area, road, river 
Text: {0} 
Answer:
 .@IAH