A Monolithic Approach and a Type-by-Type Approach for Non-Factoid Question-answering - Yokohama National University at NTCIR-6 QAC. - Tatsunori Mori; Mitsuru Sato; Madoka Ishioroshi; Yugo Nishikawa; Shigenori Nakano; Kei Kimura (NTCIR, 2007)