1. Big Data Research Center, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
2. Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, People's Republic of China
3. Web Mining Laboratory, Department of Media and Communication, City University of Hong Kong, Hong Kong SAR, People's Republic of China
4. Computational Communication Research Center, Beijing Normal University, Zhuhai 519087, People's Republic of China
5. School of Journalism and Communication, Beijing Normal University, Beijing 100875, People's Republic of China
6. College of Information and Communication Engineering, Dalian Minzu University, Dalian, People's Republic of China