to drag two-thirds through , when the melodramatic aspects start to overtake the comedy 
(ROOT (S (VP (TO to) (VP (VB drag) (ADVP (ADVP (NP (CD two) (HYPH -) (NNS thirds)) (RB through)) (, ,) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (JJ melodramatic) (NNS aspects)) (VP (VBP start) (S (VP (TO to) (VP (VB overtake) (NP (DT the) (NN comedy)))))))))))))
(ROOT (S (VP (TO ) (VP (VB ) (ADVP (ADVP (NP (CD ) (HYPH ) (NNS )) (RB )) (, ) (SBAR (WHADVP (WRB )) (S (NP (DT ) (JJ ) (NNS )) (VP (VBP ) (S (VP (TO ) (VP (VB ) (NP (DT ) (NN )))))))))))))