(S (S (BASENP (NNP Hamilton)) (VP (ADVP (RB however)) (VP (VBD said) (SBAR (IN that) (S (BASENP (JJ palliative) (NN hormone) (NN treatment)) (VP (MD could) (VP (VB prolong) (BASENP (PRPD his) (NN life))))))))) (PERIOD .))