n<apostrophe>t a hat was looking up . <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (ATS_3 (ATS_1 (RB_1 n<apostrophe>t) (NP_5 (DT_0 a) (NN_2 hat))) (VP_3 (VBD_1 was) (VP_2 (VBG_0 looking) (PRT_0 (RP_0 up))))) (DOT_0 .)) (APOSTROPHE_0 <apostrophe><apostrophe>)))