1679
-DOCSTART- RT @GHC911 : There is a potential for heavy call congestion on all phone networks . This can delay emergency calls to 9 - 1 - 1 # Houston # Houwx # houstonflood https://t.co/HApCGXx6r7
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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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