them were n<apostrophe>t left was maybe back class .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 them)) (VP_4 (ATVP_1 (VBD_0 were) (RB_1 n<apostrophe>t)) (VP_5 (VBD_2 left) (S_2 (VP_0 (ATVP_0 (VBD_2 was) (ADVP_0 (RB_1 maybe) (RB_1 back))) (NP_2 (NN_3 class))))))) (DOT_0 .)))