her back n<apostrophe>t had been for addition .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (NP_1 (PRP_0 her)) (ADVP_0 (RB_1 back) (RB_1 n<apostrophe>t))) (VP_3 (VBD_1 had) (VP_2 (VBN_0 been) (PP_0 (IN_1 for) (NP_2 (NN_3 addition)))))) (DOT_0 .)))