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(ROOT_0 (S_0 (ATS_3 (ATS_1 (CC_0 and) (NP_1 (PRP_0 He))) (VP_3 (ATVP_1 (VP_5 (MD_0 would) (VP_1 (ATVP_0 (VB_0 help) (S_2 (VP_0 (TO_0 to) (VP_1 (NN_3 gravel))))) (NP_3 (NNP_1 Ohio) (NNS_1 surfers)))) (CC_0 and)) (VP_5 (VBP_0 refer) (SBAR_0 (WHNP_0 (WDT_0 that)) (S_1 (NP_0 (DT_1 This)) (VP_5 (VBD_0 stifled) (PRT_0 (RP_0 up)))))))) (DOT_0 .)))