(S (S (NP (BASENP (DT The) (NNP MTR) (NNP Corporation)) (PRN (COMMA ,) (NP (NP (BASENP (DT the) (JJ only) (NN railway) (NN company)) (PP (IN in) (BASENP (NNP Hong) (NNP Kong)))) (PP (IN since) (NP (BASENP (DT the) (NN rail) (NN merge)) (PP (IN in) (BASENP (NN 2007)))))) (COMMA ,))) (VP (VBZ has) (VP (VBN loosened) (BASENP (PRPD their) (NNS rules))))) (PERIOD .))