it try the class <apostrophe>s , of the world : it did brown .
(ROOT_0 (S_0 (ATS_3 (ATS_4 (S_1 (NP_0 (PRP_1 it)) (VP_5 (ATVP_3 (ATVP_2 (VB_0 try) (NP_4 (ATNP_0 (DT_0 the) (NN_3 class)) (POS_0 <apostrophe>s))) (COMMA_0 ,)) (PP_0 (IN_1 of) (NP_4 (DT_0 the) (NN_2 world))))) (COLON_0 :)) (S_1 (NP_0 (PRP_1 it)) (VP_5 (VBD_0 did) (ADJP_0 (JJ_0 brown))))) (DOT_0 .)))