looks closely , insightfully at fragile , complex relationships 
(ROOT (S (VP (VBZ looks) (ADVP (RB closely) (, ,) (RB insightfully)) (PP (IN at) (NP (JJ fragile) (, ,) (JJ complex) (NNS relationships))))))
(ROOT (S (VP (VBZ ) (ADVP (RB ) (, ) (RB )) (PP (IN ) (NP (JJ ) (, ) (JJ ) (NNS ))))))