later back a thunder do one , to slept .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ADVP_0 (RB_1 later) (RB_1 back)) (NP_0 (DT_0 a) (NN_2 thunder))) (VP_3 (ATVP_3 (ATVP_2 (VB_0 do) (NP_4 (CD_0 one))) (COMMA_0 ,)) (PP_2 (TO_0 to) (NP_3 (NNP_1 slept))))) (DOT_0 .)))