This window approach is also used in the Easy-First parser of Goldberg and Elhadad (Goldberg and Elhadad, 2010) and works that extend it (Tratz and Hovy, 2011;Ma et al., 2012;Ma et al., 2013).
unlike the previous work, which made use of extensive feature engineering and rich feature functions aiming at extracting the many relevant linguistic sub-structures from the 6 subtrees and their interactions, we provide the scoring function solely with the vector-encoding of the 6 subtrees in the window.