( ( Although ( there ( have ( been ( ( a ( significant improvement ) ) ( in ( ( the ( air quality ) ) ( of ( ( Beijing and ) ( the ( road ( space availability ) ) ) ) ) ) ) ) ) ) ) ) ( , ( ( ( many ( negative responses ) ) ( of ( ( the ( city 's ) ) ( car owners ) ) ) ) ( ( were received ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (EX there)) (VP (VBP have) (VP (VBN been) (NP (NP (DT a) (JJ significant) (NN improvement)) (PP (IN in) (NP (NP (DT the) (NN air) (NN quality)) (PP (IN of) (NP (NP (NNP Beijing)) (CC and) (NP (DT the) (NN road) (NN space) (NN availability))))))))))) (, ,) (NP (NP (JJ many) (JJ negative) (NNS responses)) (PP (IN of) (NP (NP (DT the) (NN city) (POS 's)) (NN car) (NNS owners)))) (VP (VBD were) (VP (VBN received))) (. .)))
Although there have been a significant improvement in the air quality of Beijing and the road space availability, many negative responses of the city's car owners were received.
(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))))) (. .)))