2 As a baseline, we use the rules introduced in <cite>Wang et al. (2007)</cite> to decide if the DEs require reordering or not. However, since their rules only decide if there is reordering in an NP with DE, their classification result only has two classes. So, in order to compare our classifier's performance with the rules in <cite>Wang et al. (2007)</cite> , we have to map our five-class results into two classes. We mapped our five-class results into two classes. So we mapped B preposition A and relative clause into the class "reordered", and the other three classes into "not-reordered".