He discovered later might really maybe were .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 He)) (VP_4 (ATVP_1 (VBD_0 discovered) (RB_1 later)) (VP_5 (ATVP_1 (MD_0 might) (ADVP_0 (RB_0 really))) (VP_1 (ADVP_0 (RB_0 maybe)) (VBD_1 were))))) (DOT_0 .)))