Forst: Question Answering System for Second-stage Examinations at NTCIR-12 QA Lab-2 Task. - Kotaro Sakamoto; Madoka Ishioroshi; Hyogo Matsui; Takahisa Jin; Fuyuki Wada; Shu Nakayama; Hideyuki Shibuki; Tatsunori Mori; Noriko Kando (NTCIR, 2016)