(S (S (NP (BASENP (DT A) (NN challenge)) (PP (IN through) (NP (BASENP (DT the) (NN country) (POS 's)) (BASENP (NNP Constitutional) (NNP Court))))) (VP (VBD was) (VP (VP (VBN brought) (PP (IN by) (NP (BASENP (NN 28)) (PP (IN of) (NP (BASENP (DT the) (NN country) (POS 's)) (NNS senators)))))) (PP (VBG following) (S (NP (BASENP (DT the) (NNP PM) (POS 's)) (NN family)) (VP (VP (VBG selling) (NP (BASENP (PRPD their) (ADJP (NN 49) (NN %)) (NN share)) (PP (IN in) (BASENP (NNP Shin) (NNP Corporation))))) (ADVP (RB tax-free)))))))) (PERIOD .))