A big friend refer could back way smiled , anything .
(ROOT_0 (S_0 (ATS_3 (NP_1 (ATNP_1 (DT_0 A) (JJ_1 big)) (NN_0 friend)) (VP_4 (VBP_0 refer) (SBAR_0 (S_2 (VP_0 (ATVP_0 (VP_5 (MD_0 could) (VP_1 (ADVP_0 (RB_1 back) (RB_1 way)) (VBD_1 smiled))) (COMMA_0 ,)) (NP_2 (NN_3 anything))))))) (DOT_0 .)))