He mutter who to had in on a sudden yawn n<apostrophe>t Spanish .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_1 He)) (VP_4 (VBP_0 mutter) (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (VP_0 (TO_0 to) (VP_1 (ATVP_4 (VBD_2 had) (PP_2 (IN_0 in) (PP_2 (IN_0 on) (NP_6 (ATNP_1 (DT_0 a) (JJ_1 sudden)) (NN_1 yawn))))) (S_2 (NP_2 (RB_1 n<apostrophe>t)) (ADJP_0 (JJ_0 Spanish))))))))) (DOT_0 .)))