them <apostrophe>m she mumbled sitting .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 them)) (VP_4 (VBP_0 <apostrophe>m) (SBAR_0 (S_1 (NP_0 (PRP_1 she)) (VP_5 (VBD_2 mumbled) (S_2 (VP_0 (VBG_0 sitting)))))))) (DOT_0 .)))