Different research lines have been proposed around this topic, including hypernym-hyponym relation extraction (Ritter et al., 2009;Wei et al., 2012), entity relation extraction (Zhou et al., 2006;Fan et al., 2014;Lin et al., 2015) and open relation extraction (Fader et al., 2011).
previous works mainly focus on factual relations, the extraction of cognitive relations (e.g.