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-DOCSTART- Volunteers carry kids from rising # Houstonflood waters . It 's rained all day but they 're # HoustonStrong . # houston https://t.co/t6fSTP2mIH
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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:
 None