I soon were sleeping At muffled teeth .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (NP_1 (PRP_0 I)) (ADVP_0 (RB_0 soon))) (VP_3 (VBD_1 were) (VP_2 (VBG_0 sleeping) (PP_2 (IN_0 At) (NP_3 (JJ_1 muffled) (NNS_0 teeth)))))) (DOT_0 .)))