`` about boulders <apostrophe><apostrophe> she stifled .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (ATS_0 (TICK_0 ``) (PP_2 (IN_0 about) (NP_3 (NNS_1 boulders)))) (APOSTROPHE_0 <apostrophe><apostrophe>)) (NP_0 (PRP_1 she))) (VP_3 (VBD_0 stifled))) (DOT_0 .)))