every conceivable mistake a director could make in filming opera 
(ROOT (NP (NP (DT every) (JJ conceivable) (NN mistake)) (SBAR (S (NP (DT a) (NN director)) (VP (MD could) (VP (VB make) (PP (IN in) (S (VP (VBG filming) (NP (NN opera)))))))))))
(ROOT (NP (NP (DT ) (JJ ) (NN )) (SBAR (S (NP (DT ) (NN )) (VP (MD ) (VP (VB ) (PP (IN ) (S (VP (VBG ) (NP (NN )))))))))))