He stop about be , to smile .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 He)) (VP_4 (ATVP_3 (ATVP_2 (ATVP_0 (VB_0 stop) (PRT_0 (RP_0 about))) (VP_1 (VB_0 be))) (COMMA_0 ,)) (S_2 (VP_0 (TO_0 to) (VP_1 (NN_3 smile)))))) (DOT_0 .)))