However, in English, this kind of word (e.g., "front" in the caption of Figure 2) always occur directly after prepositions, which is to say, in the second position in a prepositional phrase.
we applied a rule plmod : lobj (localizer object) to reposition the dependent word of the plmod relation (e.g., "前" in Figure 2) to the position before the lobj structure (e.g., "美国 大使馆" in Figure 2).