her was sheathed to a silky yawn , <apostrophe>s .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 her)) (VP_4 (VBD_1 was) (VP_2 (VBN_0 sheathed) (PP_2 (TO_0 to) (NP_3 (ATNP_0 (NP_6 (ATNP_1 (DT_0 a) (JJ_1 silky)) (NN_1 yawn)) (COMMA_0 ,)) (POS_0 <apostrophe>s)))))) (DOT_0 .)))