slid n<apostrophe>t the boulders , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (SBAR_0 (VP_0 (ATVP_1 (VBD_0 slid) (RB_1 n<apostrophe>t)) (NP_6 (DT_0 the) (NNS_1 boulders)))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))