notwithstanding some of the writers ' sporadic dips 
(ROOT (S (VP (VBG notwithstanding) (NP (NP (DT some)) (PP (IN of) (NP (NP (DT the) (NNS writers) (POS ')) (JJ sporadic) (NNS dips)))))))
(ROOT (S (VP (VBG ) (NP (NP (DT )) (PP (IN ) (NP (NP (DT ) (NNS ) (POS )) (JJ ) (NNS )))))))