`` of structures <apostrophe>s Noah refer <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (TICK_0 ``) (PP_1 (IN_1 of) (NP_2 (NP_4 (NNS_1 structures)) (VP_2 (VBZ_0 <apostrophe>s) (SBAR_0 (S_1 (NP_0 (NNP_0 Noah)) (VP_5 (VBP_0 refer)))))))) (APOSTROPHE_0 <apostrophe><apostrophe>)))