IE systems in the real world are often required to work for new domains and new tasks within a limited adaptation or tuning time.
automatic learning of relation extraction rules for a new domain or a new task has been established as a relevant subarea in IE research and development (Muslea, 1999;Tsujii, 2000;Uszkoreit, 2011), in particular for minimally supervised or semi-supervised bootstrapping approaches (e.g., (Brin, 1998;Agichtein and Gravano, 2000;Yangarber, 2001;Sudo et al., 2003;Bunescu and Mooney, 2005;McDonald et al., 2005;Greenwood and Stevenson, 2006;Jones, 2005;Xu, 2007;Kozareva and Hovy, 2010a;Kozareva and Hovy, 2010b)).