right teeth slid back <apostrophe>s His bare classes .
(ROOT_0 (S_0 (ATS_3 (NP_1 (NN_1 right) (NNS_0 teeth)) (VP_4 (ATVP_1 (VBD_0 slid) (RB_1 back)) (VP_5 (VBZ_0 <apostrophe>s) (NP_2 (ATNP_0 (PRPDOLLAR_0 His) (JJ_0 bare)) (NP_4 (NNS_1 classes)))))) (DOT_0 .)))