looking by an sudden knoll , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (SBAR_0 (VP_0 (VBG_0 looking) (PP_2 (IN_0 by) (NP_6 (ATNP_1 (DT_0 an) (JJ_1 sudden)) (NN_1 knoll))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))