Our system not only outperforms the best single system (Björkelund et al., 2013) by 1.4%, but it also tops the ensemble system that combines three powerful parsers: the Mate parser (Bohnet, 2010), the Easy-First parser (Goldberg and Elhadad, 2010) and the Turbo parser (Martins et al., 2013) Impact of Sampling Methods We compare two sampling methods introduced in Section 3.2 with respect to their decoding efficiency.
we measure the score of the retrieved trees in testing as a function of the decoding speed, measured by the number of tokens per second.