`` onto back eyes <apostrophe><apostrophe> he heard .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (ATS_0 (TICK_0 ``) (PP_2 (IN_0 onto) (NP_3 (JJ_1 back) (NNS_0 eyes)))) (APOSTROPHE_0 <apostrophe><apostrophe>)) (NP_0 (PRP_1 he))) (VP_3 (VBD_0 heard))) (DOT_0 .)))