(S (S (BASENP (DT The) (NN cholera) (NN epidemic)) (VP (VP (VP (VBZ is) (BASENP (DT the) (JJS deadliest))) (PP (IN in) (BASENP (NNP Africa)))) (PP (IN for) (NP (BASENP (DT a) (NN decade)) (CC and) (BASENP (DT a) (NN half)))))) (PERIOD .))