the valley slithered off : it meant .
(ROOT_0 (S_0 (ATS_3 (ATS_4 (S_1 (NP_1 (DT_0 the) (NN_2 valley)) (VP_5 (VBD_0 slithered) (PRT_0 (RP_0 off)))) (COLON_0 :)) (S_1 (NP_0 (PRP_1 it)) (VP_5 (VBD_1 meant)))) (DOT_0 .)))