They assigned on the surfers down the one Still .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (ATVP_4 (VBN_0 assigned) (PP_2 (IN_0 on) (NP_3 (NP_6 (DT_0 the) (NNS_1 surfers)) (PP_0 (IN_1 down) (NP_5 (DT_0 the) (NN_2 one)))))) (ADVP_0 (RB_0 Still)))) (DOT_0 .)))