her did ahead was . her legs slithered .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (ATS_3 (NP_1 (PRP_0 her)) (VP_4 (ATVP_1 (VBD_0 did) (RB_1 ahead)) (VP_5 (VBD_1 was)))) (DOT_0 .)) (NP_0 (PRPDOLLAR_0 her) (NNS_0 legs))) (VP_3 (VBD_0 slithered))) (DOT_0 .)))