( ( Detroit ( is ( ( ( ( ( ranked seventh ) , ) ( right ( behind ( Sacramento ( , Calif. ) ) ) ) ) , ) ( in ( ( the ( top ( 10 cities ) ) ) ( for ( ( ( most improve ) ( air quality ) ) ( for ( ( achieving ( a ( 45-percent reduction ) ) ) ( in ( ( the ( average number ) ) ( of days ) ) ) ) ) ) ) ) ) ) ) ) ( ( ozone levels ) ( ( exceed ( federal standards ) ) . ) ) )
(ROOT (S (S (NP (NNP Detroit)) (VP (VBZ is) (VP (VBN ranked) (S (ADJP (JJ seventh))) (, ,) (S (ADJP (JJ right) (PP (IN behind) (NP (NNP Sacramento) (, ,) (NNP Calif.))))) (, ,) (PP (IN in) (NP (NP (DT the) (JJ top) (CD 10) (NNS cities)) (PP (IN for) (NP (NP (ADJP (RBS most) (JJ improve)) (NN air) (NN quality)) (PP (IN for) (S (VP (VBG achieving) (NP (DT a) (JJ 45-percent) (NN reduction)) (PP (IN in) (NP (NP (DT the) (JJ average) (NN number)) (PP (IN of) (NP (NNS days))))))))))))))) (NP (NN ozone) (NNS levels)) (VP (VBP exceed) (NP (JJ federal) (NNS standards))) (. .)))
Detroit is ranked seventh, right behind Sacramento, Calif., in the top 10 cities for most improve air quality for achieving a 45-percent reduction in the average number of days ozone levels exceed federal standards.
(ROOT (S (S (VP (VBG Limiting) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS cars)) (PP (IN on) (NP (DT the) (NNS roads)))))))) (VP (MD would) (ADVP (RBS most) (RB likely)) (VP (VB improve) (NP (DT the) (NN air) (NN quality)) (PP (IN in) (NP (JJ large) (NNS texas) (NNS cities))))) (. .)))