imagine a film that begins as a seven rip-off , only to switch to a mix of the shining , the thing , and any naked teenagers horror flick from the 1980s . 
(ROOT (S (VP (VB imagine) (NP (NP (DT a) (NN film)) (SBAR (WHNP (WDT that)) (S (VP (VBZ begins) (PP (IN as) (NP (DT a) (CD seven) (NN rip) (HYPH -) (NN off))) (, ,) (S (ADVP (RB only)) (VP (TO to) (VP (VB switch) (PP (IN to) (NP (NP (DT a) (NN mix)) (PP (IN of) (NP (NP (DT the) (NN shining)) (, ,) (NP (DT the) (NN thing)) (, ,) (CC and) (NP (NP (DT any) (JJ naked) (NNS teenagers) (NN horror) (NN flick)) (PP (IN from) (NP (DT the) (NNS 1980s)))))))))))))))) (. .)))
(ROOT (S (VP (VB ) (NP (NP (DT ) (NN )) (SBAR (WHNP (WDT )) (S (VP (VBZ ) (PP (IN ) (NP (DT ) (CD ) (NN ) (HYPH ) (NN ))) (, ) (S (ADVP (RB )) (VP (TO ) (VP (VB ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (DT ) (NN )) (, ) (NP (DT ) (NN )) (, ) (CC ) (NP (NP (DT ) (JJ ) (NNS ) (NN ) (NN )) (PP (IN ) (NP (DT ) (NNS )))))))))))))))) (. )))