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(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 himself)) (VP_4 (ATVP_3 (ATVP_2 (VB_0 be) (PRT_0 (RP_0 up))) (COMMA_0 ,)) (S_2 (VP_0 (TO_0 to) (VP_1 (VB_0 be) (VP_2 (VBN_0 jerked) (PP_2 (IN_0 while) (NP_3 (NP_6 (ATNP_1 (ATNP_0 (DT_0 A) (NN_3 muscle)) (NN_0 chin)) (NN_1 tree)) (PP_0 (IN_1 with) (NP_6 (ATNP_1 (ATNP_0 (NP_4 (NNP_0 Noah) (POS_0 <apostrophe>s)) (NN_2 alpaca)) (NN_0 friend)) (NN_1 wall))))))))))) (DOT_0 ?)))