it grimaced sitting while `` <apostrophe><apostrophe> .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_1 it)) (VP_4 (VBD_1 grimaced) (VP_2 (VBG_0 sitting) (PP_2 (ATPP_0 (IN_2 while) (TICK_0 ``)) (APOSTROPHE_0 <apostrophe><apostrophe>))))) (DOT_0 .)))