These approaches, however, incorporate language-specific characteristics and thus are costly in requiring substantial amount of annotations to adapt to a new language (Chen and Vincent, 2012;Blessing and Schütze, 2012;Li et al., 2012;Danilova et al., 2014;Agerri et al., 2016;Hsi et al., 2016;Feng et al., 2016).
two entity mentions are unlikely to be combined into one word in Arabic, thus Relation Extraction does not suffer from tokenization errors and corresponding POS features.