The boy then brushed up on with the group of one .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (NP_1 (DT_1 The) (NN_2 boy)) (ADVP_0 (RB_0 then))) (VP_3 (ATVP_3 (VBD_2 brushed) (PRT_0 (RP_0 up))) (PP_2 (IN_0 on) (PP_2 (IN_0 with) (NP_3 (NP_5 (DT_0 the) (NN_2 group)) (PP_0 (IN_1 of) (NP_5 (NN_3 one)))))))) (DOT_0 .)))