who flung the surfer in his world , all would been never sure .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (VP_0 (ATVP_4 (VBG_0 flung) (NP_5 (DT_0 the) (NN_2 surfer))) (PP_2 (IN_0 in) (NP_3 (PRPDOLLAR_0 his) (NN_0 world)))))) (COMMA_0 ,)) (NP_0 (DT_1 all))) (VP_3 (MD_0 would) (VP_1 (VBN_0 been) (ADJP_0 (RB_0 never) (JJ_0 sure))))) (DOT_0 .)))