(S (S (PP (IN Before) (NP (BASENP (PRPD his) (NN post)) (PP (IN at) (BASENP (NNP Apple))))) (COMMA ,) (S (BASENP (NNP Cook)) (VP (VP (VBD held) (BASENP (NNS positions))) (PP (IN at) (BASENP (NNP IBM) (CC and) (NNP Compaq)))))) (PERIOD .))