making it awfully hard to buy the impetus for the complicated love triangle that develops between the three central characters 
(ROOT (S (VP (VBG making) (S (NP (NP (PRP it))) (ADJP (RB awfully) (JJ hard)) (S (VP (TO to) (VP (VB buy) (NP (NP (DT the) (NN impetus)) (PP (IN for) (NP (NP (DT the) (JJ complicated) (NN love) (NN triangle)) (SBAR (WHNP (WDT that)) (S (VP (VBZ develops) (PP (IN between) (NP (DT the) (CD three) (JJ central) (NNS characters))))))))))))))))
(ROOT (S (VP (VBG ) (S (NP (NP (PRP ))) (ADJP (RB ) (JJ )) (S (VP (TO ) (VP (VB ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (DT ) (JJ ) (NN ) (NN )) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (PP (IN ) (NP (DT ) (CD ) (JJ ) (NNS ))))))))))))))))