(S (S (NP (BASENP (NNP Ryan) (NNP Couture)) (PRN (COMMA ,) (NP (BASENP (NN son)) (PP (IN of) (BASENP (NNP MMA) (NN legend) (NNP Randy) (NNP Couture)))) (COMMA ,))) (VP (VP (VBD remained) (ADJP (JJ undefeated))) (PP (IN in) (BASENP (PRPD his) (JJ second-ever) (NN bout))))) (PERIOD .))