when he dropped to , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (SBAR_0 (WHADVP_0 (WRB_0 when)) (S_1 (NP_0 (PRP_1 he)) (VP_5 (VBD_2 dropped) (S_2 (TO_0 to))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))