(S (S (PP (IN Of) (BASENP (DT those) (NN 80) (NNS times))) (COMMA ,) (S (S (NP (BASENP (NN 15)) (PP (IN of) (BASENP (PRP them)))) (VP (VBD were) (BASENP (JJ toxic) (NNS seizures)))) (CC and) (S (BASENP (NN two) (NNS patients)) (VP (VBD presented) (BASENP (ADJP (NN life) (VBG threatening)) (NNS conditions)))))) (PERIOD .))