you doze off thirty minutes into the film 
(ROOT (S (NP (PRP you)) (VP (VBP doze) (PRT (RP off)) (NP (NP (CD thirty) (NNS minutes)) (PP (IN into) (NP (DT the) (NN film)))))))
(ROOT (S (NP (PRP )) (VP (VBP ) (PRT (RP )) (NP (NP (CD ) (NNS )) (PP (IN ) (NP (DT ) (NN )))))))