The Secret Service initiated a number of security enhancements around the White House complex.
( ( The ( Secret Service ) ) ( ( ( initiated ( ( a number ) ( of ( security enhancements ) ) ) ) ( around ( the ( White ( House complex ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Secret) (NNP Service)) (VP (VBD initiated) (NP (NP (DT a) (NN number)) (PP (IN of) (NP (NN security) (NNS enhancements)))) (PP (IN around) (NP (DT the) (NNP White) (NNP House) (NN complex)))) (. .)))
White House gained improvements by enhanced security.
( ( White House ) ( ( ( gained improvements ) ( by ( enhanced security ) ) ) . ) )
(ROOT (S (NP (NNP White) (NNP House)) (VP (VBD gained) (NP (NNS improvements)) (PP (IN by) (NP (JJ enhanced) (NN security)))) (. .)))