In fact, due to parser's performance and word alignment ac-curacies, the statistics we collected from the GALE dataset, containing 10 million sentence-pairs, show that the children in the subtree VP(PP,VP) is translated monotonically 126310 times, while reordered of only 22144 times.
the hand-aligned data support the swap for 1245 times, and monotonically for only 168 times.