It felt to slithered out of attention .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 It)) (VP_4 (VBD_2 felt) (S_2 (VP_0 (TO_0 to) (VP_1 (ATVP_3 (VBD_2 slithered) (PRT_0 (RP_0 out))) (PP_0 (IN_1 of) (NP_2 (NN_3 attention)))))))) (DOT_0 .)))