She warmed so had down to keep .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 She)) (VP_4 (ATVP_1 (VBD_0 warmed) (RB_1 so)) (VP_5 (ATVP_3 (VBD_2 had) (PRT_0 (RP_0 down))) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 keep))))))) (DOT_0 .)))