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-DOCSTART- Houston Flood Relief Fund by @JJWatt # HurricaneHarvey # Harvey # HoustonFlood # HoustonStrong # Houston https://t.co/8NJ3FF0O6W via @youcaring
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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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