(S (S (NP (BASENP (NNP John) (NNP F.) (NNP Kerry)) (COMMA ,) (NP (BASENP (DT the) (NN senator)) (PP (IN for) (BASENP (NNP Massachusetts))))) (VP (VP (VBD was) (VP (VBN supposed) (S (VP (TO to) (VP (VB attend)))))) (CC but) (VP (VP (MD could) (RB not)) (PP (IN due) (PP (TO to) (NP (NP (BASENP (NN voting)) (PP (IN on) (BASENP (DT the) (JJ economic) (NN stimulus) (NN package)))) (PP (IN in) (BASENP (NNP Washington) (NNP D.C.))))))))) (PERIOD .))