to , they knew waking But think .
(ROOT_0 (S_0 (ATS_3 (ATS_4 (SBAR_0 (VP_0 (TO_0 to))) (COMMA_0 ,)) (S_1 (NP_0 (PRP_1 they)) (VP_5 (ATVP_1 (VP_5 (VBD_2 knew) (S_2 (VP_0 (VBG_0 waking)))) (CC_0 But)) (VP_1 (VB_0 think))))) (DOT_0 .)))