Related to this, we further noticed that several of<cite> Klein & Manning's (2003)</cite> features, such as marking N P s as right recursive or possessive have the property of annotating with the label of the rightmost child (when they are NP and POS respectively). We generalize this by marking all nodes both with their rightmost child and (an analogous feature) leftmost child. We also mark whether or not a node borders the end of a sentence, save for ending punctuation. (For instance, in this sentence, all the constituents with the second "marked" rightmost in their span would be marked).