(S (S (BASENP (NNP China)) (VP (VBZ has) (NP (NP (NP (BASENP (NN one)) (PP (IN of) (NP (ADJP (BASENP (DT the) (NN world) (POS 's)) (JJS largest)) (BASENP (NN prison) (NNS systems))))) (PP (IN with) (BASENP (QP (RB over) (NN 1) (NN million)) (NNS prisoners)))) (COMMA ,) (ADJP (JJ similar) (PP (TO to) (BASENP (NNP Russia))))))) (PERIOD .))