2167
-DOCSTART- RT @JenArnoldMD : So proud of colleagues @TexasChildrens - caring for kids in # Houston tirelessly thru # houstonflood Harvey - YouTube https://t.co/nxr7MNqth0
 None
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:
 None