205
-DOCSTART- RT @CBSNews : Harvey 's catastrophic flooding is the latest chapter in Houston 's flood history . Why the city is prone to flooding https://t.co/5ehBbM1nxy https://t.co/jgXXJJd69 M
 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