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-DOCSTART- RT @HoustonOEM : .@IAH and @hobbyairports remain closed . We hope to reopen them later this week . They are being used for emergency operations . # houstonflood
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: exact location, area, road, river 
Text: {0} 
Answer:
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