before she back happened , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (SBAR_0 (IN_2 before) (S_1 (ATS_1 (NP_1 (PRP_0 she)) (ADVP_0 (RB_0 back))) (VP_3 (VBD_0 happened)))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))