Our approach follows Langkilde-Geary (2002) and Callaway (2003) in aiming to leverage the Penn Treebank to develop a broad-coverage surface realizer for English.
the main difference between the approaches is that ours consists of a multitagging step followed by the bottomup construction of a realization chart, while theirs involves the top-down selection of the single most likely supertag for each node that is grammatically compatible with the parent node, with the probability conditioned only on the child nodes.