The White House denies this.
( ( The ( White House ) ) ( ( denies this ) . ) )
(ROOT (S (NP (DT The) (NNP White) (NNP House)) (VP (VBZ denies) (NP (DT this))) (. .)))
This has been accepted by the White House.
( This ( ( has ( been ( accepted ( by ( the ( White House ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ has) (VP (VBN been) (VP (VBN accepted) (PP (IN by) (NP (DT the) (NNP White) (NNP House)))))) (. .)))