Can someone tell me
i) in terms of constituent tree structure, if a long way is a complement as opposed to an adjunct
ii) in terms of thematic roles, whether a long way takes on the role of location or is there such a role as "distance"?
iii) in terms of syntactic category, is the ostensible NP functioning as an adverbial phrase?
iv) in the sentence She has come a long way, is the thematic role of the subject theme/experiencer/agent?
My appreciation for your time and help!!