really , that could to think to be .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (ADVP_0 (RB_0 really)) (COMMA_0 ,)) (NP_0 (DT_1 that))) (VP_3 (MD_0 could) (VP_1 (TO_0 to) (VP_1 (VB_0 think) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 be)))))))) (DOT_0 .)))