1905
-DOCSTART- RT @AvenidaHouston : Calling volunteers able to safely serve . Pls register @ https://t.co/xSDdRn0Wdw B4 arriving @GRBCC . Check - in Hall E.
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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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