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-DOCSTART- # Houston # Harvey news at top & amp ; bottom of the hour ' till 8 PM on @HPMNews887 . Keep us tuned : https://t.co/7X2JVMtaem
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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:
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