if they looked at how this movie turned out 
(ROOT (SBAR (IN if) (S (NP (PRP they)) (VP (VBD looked) (PP (IN at) (SBAR (WHADVP (WRB how)) (S (NP (DT this) (NN movie)) (VP (VBD turned) (PRT (RP out))))))))))
(ROOT (SBAR (IN ) (S (NP (PRP )) (VP (VBD ) (PP (IN ) (SBAR (WHADVP (WRB )) (S (NP (DT ) (NN )) (VP (VBD ) (PRT (RP ))))))))))