1. Department of Chinese Literature, National Tsing Hua University, Taiwan and Department of Computer Science, National Yang Ming Chiao Tung University, Taiwan
2. Institute of Communication Studies, National Yang Ming Chiao Tung University, Taiwan and Department of Computer Science, National Yang Ming Chiao Tung University, Taiwan
3. Department of Computer Science, National Yang Ming Chiao Tung University, Taiwan
4. Department of Computer Science, National Yang Ming Chiao Tung University, Taiwan and Institute of Communication Studies, National Yang Ming Chiao Tung University, Taiwan