(S (S (NP (BASENP (NNP BP)) (PRN (COMMA ,) (SBAR (WHNP (WP who)) (S (VP (VP (VBD owned) (CC and) (VBD operated)) (BASENP (DT the) (NNP Deepwater) (NNP Horizon))))) (COMMA ,))) (VP (VBZ has) (VP (VBN denied) (SBAR (IN that) (S (NP (DT any) (NP (BASENP (NN oil)) (CC or) (BASENP (NN methane) (NN gas)))) (VP (VBZ is) (VP (VBG leaking) (PP (IN from) (BASENP (DT the) (NN sea) (NN floor)))))))))) (PERIOD .))