you asked shifted of appropriate back <apostrophe> boy .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_1 you)) (VP_4 (VBD_1 asked) (VP_2 (VBN_0 shifted) (PP_0 (IN_1 of) (NP_4 (NP_4 (ATNP_0 (JJ_0 appropriate) (JJ_1 back)) (POS_0 <apostrophe>)) (NN_2 boy)))))) (DOT_0 .)))