It spit to think even back heard .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 It)) (VP_4 (VBD_2 spit) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 think) (ADJP_0 (ATADJP_0 (RB_0 even) (RB_1 back)) (VBN_0 heard))))))) (DOT_0 .)))