maybe , that refer who her fingers slithered to really tried his stars , her was Wiping the long alpaca off a boulders .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_0 (ATS_0 (ATS_2 (ADVP_0 (RB_0 maybe)) (COMMA_0 ,)) (S_1 (NP_0 (DT_1 that)) (VP_5 (VBP_0 refer) (SBAR_0 (WHNP_0 (WP_0 who)) (S_2 (NP_0 (PRPDOLLAR_0 her) (NNS_0 fingers)) (VP_5 (VBD_2 slithered) (S_2 (VP_0 (TO_0 to) (VP_1 (ATVP_0 (ADVP_0 (RB_0 really)) (VBD_2 tried)) (NP_3 (PRPDOLLAR_0 his) (NNS_0 stars))))))))))) (COMMA_0 ,)) (NP_0 (PRP_1 her))) (VP_3 (VBD_1 was) (VP_2 (VBG_0 Wiping) (NP_5 (NP_6 (ATNP_1 (DT_0 the) (JJ_1 long)) (NN_1 alpaca)) (PP_0 (IN_1 off) (NP_6 (DT_0 a) (NNS_1 boulders))))))) (DOT_0 .)))