without sacrificing the integrity of the opera 
(ROOT (PP (IN without) (S (VP (VBG sacrificing) (NP (NP (DT the) (NN integrity)) (PP (IN of) (NP (DT the) (NN opera))))))))
(ROOT (PP (IN ) (S (VP (VBG ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN ))))))))