See Table 4  error seen when removing such published features as the verb-intervening component of the distance metric, which results in an F-measure error increase of 9.86%, or the subcat feature, which results in a 7.62% increase in F-measure error.
33 while the collection of unpublished details presented in Sections 4-7 is disparate, in toto those details are every bit as important to overall parsing performance as certain of the published features.