's (2017a) approach to mildly nonprojective parsing in what, to our knowledge, is the first implementation of exact decoding for a non-projective transition-based parser.
to resolve the conflict between including s 1 for richer representations and the unavailability of s 1 in scoring the sh transitions in the COMBINE steps, we propose a hybrid scoring approach -we use features ts 0 , b 0 u when scoring a sh transition, and features ts 1 , s 0 , b 0 u for consideration of reduce transitions.