if i want a real movie , i 'll buy the criterion dvd . 
(ROOT (S (SBAR (IN if) (S (NP (PRP i)) (VP (VBP want) (NP (DT a) (JJ real) (NN movie))))) (, ,) (NP (PRP i)) (VP (MD 'll) (VP (VB buy) (NP (DT the) (NN criterion) (NN dvd)))) (. .)))
(ROOT (S (SBAR (IN ) (S (NP (PRP )) (VP (VBP ) (NP (DT ) (JJ ) (NN ))))) (, ) (NP (PRP )) (VP (MD ) (VP (VB ) (NP (DT ) (NN ) (NN )))) (. )))