to an conference by face-up , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (PP_2 (TO_0 to) (NP_3 (NP_5 (DT_0 an) (NN_2 conference)) (PP_0 (IN_1 by) (NP_2 (NN_3 face-up))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))