3) Our findings are more consistent with most previous work on configurations such as usefulness of character information (Lample et al., 2016; <cite>Ma and Hovy, 2016</cite>) , optimizer (Chiu and Nichols, 2016; Lample et al., 2016; <cite>Ma and Hovy, 2016</cite>) and tag scheme (Ratinov and Roth, 2009; Dai et al., 2015) .