He grew to keep up to the world over surfers .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 He)) (VP_4 (VBD_2 grew) (S_2 (VP_0 (TO_0 to) (VP_1 (ATVP_2 (VB_0 keep) (PRT_0 (RP_0 up))) (PP_2 (TO_0 to) (NP_3 (NP_5 (DT_0 the) (NN_2 world)) (PP_0 (IN_1 over) (NP_4 (NNS_1 surfers)))))))))) (DOT_0 .)))