it 's tough to watch , 
(ROOT (S (NP (NP (PRP it))) (VP (VBZ 's) (ADJP (JJ tough) (SBAR (S (VP (TO to) (VP (VB watch))))))) (, ,)))
(ROOT (S (NP (NP (PRP ))) (VP (VBZ ) (ADJP (JJ ) (SBAR (S (VP (TO ) (VP (VB ))))))) (, )))