stars let to was ahead then to move up .
(ROOT_0 (S_0 (ATS_3 (NP_1 (NNS_0 stars)) (VP_4 (VBD_0 let) (SBAR_0 (S_2 (VP_0 (TO_0 to) (VP_1 (ATVP_3 (ATVP_4 (VBD_1 was) (RB_1 ahead)) (ADVP_0 (RB_0 then))) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 move) (PRT_0 (RP_0 up))))))))))) (DOT_0 .)))