(S (S (NP (BASENP (DT The) (NN number)) (PP (IN of) (NP (NP (BASENP (VBN confirmed) (NN human) (NNS cases)) (PP (IN of) (BASENP (NN H5N1)))) (PP (IN in) (BASENP (NNP Turkey)))))) (VP (VBZ is) (BASENP (NN 18)))) (PERIOD .))