“…Nowadays, Twitter, Facebook, Flicker and Weibo have become indispensable platforms for people to share their ideas and disseminate vital information in time [14][15][16], in particularly when a natural disaster, public safety event, or disease infection event occurs [17][18][19][20][21]. Data collected through these platforms have been used in improving situation awareness [22][23][24], event detection [25,26], communication analysis [27,28] and even helping governments guide the public opinions [29,30].Social media data have also been used to detect and monitor the ongoing development of disasters such as influenza transmission, floods, typhoons, hurricanes, and terrorist attacks [31][32][33][34]. Different social media data have been examined to reveal the different development stages of a disaster and how human response to the development stages [35][36][37].…”