(S (S (PP (VBG According) (PP (TO to) (NP (BASENP (NNP Robin) (NNP Cahill)) (COMMA ,) (NP (BASENP (JJ general) (NN manager)) (PP (IN of) (BASENP (DT the) (NNP Darwin) (NNP Private) (NNP Hospital))))))) (COMMA ,) (S (BASENP (JJ ovarian) (NNS pregnancies)) (VP (VBP occur) (PP (IN in) (NP (BASENP (RB only) (NN 1)) (PP (IN in) (BASENP (DT every) (NN 40,000) (NNS fertilisations)))))))) (PERIOD .))