While traditional Information Extraction (IE) (ARPA, 1991;ARPA, 1998) focused on identifying and extracting specific relations of interest, there has been great interest in scaling IE to a broader set of relations and to far larger corpora (Banko et al., 2007;Hoffmann et al., 2010;Mintz et al., 2009;Carlson et al., 2010;.
the requirement of having pre-specified relations of interest is a significant obstacle.