output the alignment of the intermediate sentence
bug fix: combine blocks correctly when source words are discontiuous
bug fix: skip null aligned span when combine blocks\nPrefer insert at lower level\noutput statistics for gold standard
bug fix: set max Levenshtein loss to the *gold* size
set maximum insert/delete proportional to the sentence length
do we need to do insert/delete together with reordering?
add BA features
instead the oracle, latent variable structure
bug fix: gold shift if not reduce, or possilbe to reduce after shift
latent variable for iparser
averaged perceptron
bug fix: shift after swap
pegasos for shift reduce parser