(S (S (NP (BASENP (DT The) (NN cause)) (PP (IN of) (BASENP (NN death)))) (VP (VBD was) (VP (VBN established) (S (VP (TO to) (VP (VB be) (NP (BASENP (NNS complications)) (PP (IN of) (BASENP (NN diabetes)))))))))) (PERIOD .))