under mountains skin , I <apostrophe>s .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ATS_2 (PP_2 (IN_0 under) (NP_3 (NP_4 (NNS_1 mountains)) (NN_2 skin))) (COMMA_0 ,)) (NP_0 (PRP_1 I))) (VP_3 (VBZ_0 <apostrophe>s))) (DOT_0 .)))