For example, in Figure 1, the reason why we align VPe 3 with VPc 2 but not IP 2 is that we need to include the function word Š in the phrase alignment, because the very reason why the object of the verb ëZ/'call', namely, £/'that', appears before the verb is due to the presence of Š.
there is an important grammatical dependency between £ and Š, and excluding Š outside the phrase alignment that contains £ will sever this dependency.