on a group By anything , The <apostrophe>s on I .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 on) (NP_3 (NP_5 (DT_0 a) (NN_2 group)) (PP_2 (IN_0 By) (NP_3 (NN_3 anything))))) (COMMA_0 ,)) (NP_0 (DT_1 The))) (VP_3 (VBZ_0 <apostrophe>s) (PP_1 (IN_1 on) (NP_0 (PRP_1 I))))) (DOT_0 .)))