below she could have never heard before surfers .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ADVP_0 (RB_0 below)) (NP_0 (PRP_1 she))) (VP_3 (MD_0 could) (VP_1 (VB_0 have) (VP_2 (ATVP_4 (ADVP_0 (RB_0 never)) (VBN_0 heard)) (PP_2 (IN_0 before) (NP_3 (NNS_1 surfers))))))) (DOT_0 .)))