(S (S (NP (BASENP (DT The) (NN cause)) (PP (IN of) (BASENP (DT the) (NN disease)))) (VP (VBZ has) (VP (VBN been) (VP (VBN identified) (PP (IN as) (NP (BASENP (NN Enterovirus) (NN 71)) (PRN (LRB -LRB-) (BASENP (NN EV-71)) (RRB -RRB-)))))))) (PERIOD .))