you <apostrophe>s because n<apostrophe>t , of a classes .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_1 you)) (VP_4 (ATVP_3 (ATVP_2 (VBZ_0 <apostrophe>s) (ADVP_0 (IN_2 because) (RB_1 n<apostrophe>t))) (COMMA_0 ,)) (PP_1 (IN_1 of) (NP_2 (DT_0 a) (NNS_1 classes))))) (DOT_0 .)))