I is for class , help , at he .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 I)) (VP_4 (ATVP_3 (ATVP_2 (ATVP_0 (VP_5 (VBZ_0 is) (PP_1 (IN_1 for) (NP_2 (NN_3 class)))) (COMMA_0 ,)) (VP_1 (VB_0 help))) (COMMA_0 ,)) (PP_1 (IN_1 at) (NP_0 (PRP_1 he))))) (DOT_0 .)))