(S (S (BASENP (DT The) (NN walk)) (VP (VBZ marks) (NP (NP (NP (BASENP (NNP Chiao) (POS 's)) (NN fifth)) (PP (IN for) (NP (NP (BASENP (NN 31) (NNS hours)) (COMMA ,) (BASENP (NN 34) (NNS minutes))) (COMMA ,) (BASENP (JJ accumulated) (NN time))))) (CC and) (NP (BASENP (NNP Shapirov) (POS 's)) (NN first))))) (PERIOD .))