had to sit through it again 
(ROOT (S (VP (VBD had) (S (VP (TO to) (VP (VB sit) (PP (IN through) (NP (PRP it))) (ADVP (RB again))))))))
(ROOT (S (VP (VBD ) (S (VP (TO ) (VP (VB ) (PP (IN ) (NP (PRP ))) (ADVP (RB ))))))))