He howled to worried asked n<apostrophe>t The thunder .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 He)) (VP_4 (VBD_2 howled) (S_2 (VP_0 (TO_0 to) (VP_1 (VBN_0 worried) (SBAR_0 (S_2 (VP_0 (ATVP_1 (VBD_0 asked) (RB_1 n<apostrophe>t)) (NP_5 (DT_0 The) (NN_2 thunder)))))))))) (DOT_0 .)))