She teaching the boy <apostrophe>s best valley at the friend back there ?
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 She)) (VP_4 (ATVP_4 (VBG_0 teaching) (NP_3 (NP_6 (ATNP_1 (NP_4 (ATNP_0 (DT_0 the) (NN_3 boy)) (POS_0 <apostrophe>s)) (JJS_0 best)) (NN_1 valley)) (PP_0 (IN_1 at) (NP_5 (DT_0 the) (NN_2 friend))))) (ADVP_0 (RB_1 back) (RB_1 there)))) (DOT_0 ?)))