`` at gravel structures and full kids one fingers came off to a surfers .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (TICK_0 ``) (PP_1 (IN_1 at) (NP_2 (ATNP_0 (ATNP_0 (NP_4 (JJ_1 gravel) (NNS_1 structures)) (CC_0 and)) (JJ_0 full)) (NP_4 (NNS_1 kids))))) (NP_0 (CD_0 one) (NNS_0 fingers))) (VP_3 (ATVP_3 (VBD_2 came) (PRT_0 (RP_0 off))) (PP_2 (TO_0 to) (NP_2 (DT_0 a) (NNS_1 surfers))))) (DOT_0 .)))