He spoke back Several so <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (SBAR_0 (S_1 (NP_1 (PRP_0 He)) (VP_5 (VBD_0 spoke) (ADJP_0 (RB_0 back) (JJ_0 Several))))) (ADVP_0 (RB_0 so))) (APOSTROPHE_0 <apostrophe><apostrophe>)))