later boulders used than everything sudden , , there was .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_0 (ATS_0 (S_1 (VP_0 (ATVP_4 (ADVP_0 (RB_1 later) (NP_4 (NNS_1 boulders))) (VBN_0 used)) (PP_2 (IN_0 than) (NP_3 (NN_3 everything) (JJ_0 sudden))))) (COMMA_0 ,)) (COMMA_0 ,)) (NP_0 (EX_0 there))) (VP_3 (VBD_0 was))) (DOT_0 .)))