at the visible began slithered water able higher and higher .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (PP_1 (IN_1 at)) (NP_5 (DT_0 the) (JJ_0 visible))) (VP_3 (VBD_1 began) (VP_2 (ATVP_2 (VBD_2 slithered) (NP_3 (NN_3 water) (JJ_0 able))) (ADVP_0 (ATADVP_9 (JJR_0 higher) (CC_0 and)) (JJR_0 higher))))) (DOT_0 .)))