sentence1: we suggest a shift in focus from constraining locality and complexity through restrictions that all trees in a tree set must adjoin within a single tree or tree set to constraining locality and complexity through restrictions on the derivational distance between trees in the same tree set in a valid derivation .
sentence2: in this paper we suggest a shift in focus from constraining locality and complexity through tree-and set-locality to constraining locality and complexity through restrictions on the derivational distance between trees in the same tree set in a valid derivation .