The decrease in performance caused by adding the QuestionBank training data together with the modified NP annotation on section 23 is comparable to the one caused by adding the modified NP annotation alone (a decrease from 90.263 to 90.04, whereas for the original Penn Treebank data the F-score decreased from 90.43 to 89.96), but this slight decrease is more than offset by the increase in semantic information obtained from the <cite>Vadas and Curran (2007)</cite> annotation for complex base NPs.