The creation of a national highway system in the 1950s further fostered the development of mass retailing by opening vast new spaces in suburban malls.
( ( ( The creation ) ( of ( ( a ( national ( highway system ) ) ) ( in ( the 1950s ) ) ) ) ) ( further ( ( ( fostered ( ( the development ) ( of ( mass retailing ) ) ) ) ( by ( ( opening ( vast ( new spaces ) ) ) ( in ( suburban malls ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (NN creation)) (PP (IN of) (NP (NP (DT a) (JJ national) (NN highway) (NN system)) (PP (IN in) (NP (DT the) (NNS 1950s)))))) (ADVP (RB further)) (VP (VBD fostered) (NP (NP (DT the) (NN development)) (PP (IN of) (NP (JJ mass) (NN retailing)))) (PP (IN by) (S (VP (VBG opening) (NP (JJ vast) (JJ new) (NNS spaces)) (PP (IN in) (NP (JJ suburban) (NNS malls))))))) (. .)))
The completion of national roads in the 50s helped the advancement of mass retailing.
( ( ( The completion ) ( of ( ( national roads ) ( in ( the 50s ) ) ) ) ) ( ( helped ( ( the advancement ) ( of ( mass retailing ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN completion)) (PP (IN of) (NP (NP (JJ national) (NNS roads)) (PP (IN in) (NP (DT the) (NNS 50s)))))) (VP (VBD helped) (NP (NP (DT the) (NN advancement)) (PP (IN of) (NP (JJ mass) (NN retailing))))) (. .)))