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-DOCSTART- Mayor @SylvesterTurner is heading to GRB shelter : https://t.co/AeKLjCfgIm Should be leaving here ( city emergency center ) in a few minutes .
 GRB
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:
 GRB