to whether you 've seen pornography or documentary 
(ROOT (PP (IN to) (SBAR (IN whether) (S (NP (PRP you)) (VP (VBP 've) (VP (VBN seen) (NP (NN pornography) (CC or) (NN documentary))))))))
(ROOT (PP (IN ) (SBAR (IN ) (S (NP (PRP )) (VP (VBP ) (VP (VBN ) (NP (NN ) (CC ) (NN ))))))))