Another<cite> Klein and Manning (2003)</cite> feature we try includes the temporal NP feature, where TMP markings in the treebank are retained, and propagated down the head inheritance path of the tree. It is worth mentioning that all the features here come directly from the treebank. For instance, the part of speech of the head feature has values only from the raw treebank tag set. When a preterminal cluster is split, this assignment does not change the value of this feature.