(S (S (BASENP (JJ Former) (NNP PM) (NNP Kevin) (NNP Rudd)) (VP (VBD had) (VP (VBN committed) (PP (TO to) (S (VP (VP (VBG holding) (BASENP (NN three) (NNS debates))) (PP (IN before) (BASENP (DT the) (NN election))))))))) (PERIOD .))