takes a surprising , subtle turn at the midway point 
(ROOT (S (VP (VBZ takes) (NP (DT a) (JJ surprising) (, ,) (JJ subtle) (NN turn)) (PP (IN at) (NP (DT the) (JJ midway) (NN point))))))
(ROOT (S (VP (VBZ ) (NP (DT ) (JJ ) (, ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (JJ ) (NN ))))))