did n't know what kind of movie they were making 
(ROOT (S (VP (VBD did) (RB n't) (VP (VB know) (SBAR (WHNP (WHNP (WDT what) (NN kind)) (PP (IN of) (NP (NN movie)))) (S (NP (PRP they)) (VP (VBD were) (VP (VBG making)))))))))
(ROOT (S (VP (VBD ) (RB ) (VP (VB ) (SBAR (WHNP (WHNP (WDT ) (NN )) (PP (IN ) (NP (NN )))) (S (NP (PRP )) (VP (VBD ) (VP (VBG )))))))))