(S (S (NP (BASENP (NNP Coel) (NNP Hellier)) (PP (IN of) (BASENP (NNP Keele) (NNP University)))) (VP (VBD led) (NP (BASENP (DT a) (NN group)) (PP (IN of) (NP (BASENP (NNS researchers)) (SBAR (WHNP (WDT that)) (S (VP (VBD discovered) (BASENP (DT the) (NN planet)))))))))) (PERIOD .))