you may feel compelled to watch the film twice or pick up a book on the subject . 
(ROOT (S (NP (PRP you)) (VP (MD may) (VP (VB feel) (ADJP (VBN compelled) (S (VP (TO to) (VP (VP (VB watch) (NP (DT the) (NN film)) (ADVP (RB twice))) (CC or) (VP (VB pick) (PRT (RP up)) (NP (NP (DT a) (NN book)) (PP (IN on) (NP (DT the) (NN subject))))))))))) (. .)))
(ROOT (S (NP (PRP )) (VP (MD ) (VP (VB ) (ADJP (VBN ) (S (VP (TO ) (VP (VP (VB ) (NP (DT ) (NN )) (ADVP (RB ))) (CC ) (VP (VB ) (PRT (RP )) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN ))))))))))) (. )))