(S (S (NP (BASENP (NNP Steve) (NNP Jobs)) (PRN (COMMA ,) (NP (BASENP (NN founder)) (PP (IN of) (BASENP (NNP Apple)))) (COMMA ,))) (VP (VBZ has) (VP (VBN chosen) (S (VP (TO to) (VP (VP (VB step) (PRT (RP down))) (PP (IN from) (NP (BASENP (PRPD his) (NN post)) (PP (IN as) (NP (BASENP (NNP CEO)) (PP (IN of) (BASENP (DT the) (NN company))))))))))))) (PERIOD .))