(S (S (S (NP (BASENP (JJ American) (NNP Bill) (NNP Gates)) (PRN (COMMA ,) (NP (BASENP (NN co-founder)) (PP (IN of) (BASENP (NNP Microsoft) (NNP Corp)))) (COMMA ,))) (VP (VBZ is) (VP (ADVP (RB again)) (VP (VP (VBN listed) (PP (IN in) (BASENP (JJ second) (NN place)))) (PP (IN with) (BASENP (QP (DOLLAR US$) (NN 56) (NN billion)))))))) (SBAR (IN while) (S (NP (BASENP (NN investor) (NNP Warren) (NNP Buffett)) (PP (IN of) (BASENP (NNP Berkshire) (NNP Hathaway)))) (VP (VBZ is) (BASENP (NN third)))))) (PERIOD .))