that moved to keep When they slid up .
(ROOT_0 (S_0 (ATS_3 (NP_0 (DT_1 that)) (VP_2 (VBN_0 moved) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 keep) (SBAR_0 (WHADVP_0 (WRB_0 When)) (S_1 (NP_0 (PRP_1 they)) (VP_5 (VBD_0 slid) (PRT_0 (RP_0 up)))))))))) (DOT_0 .)))