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(ROOT_0 (S_0 (ATS_3 (NP_1 (DT_1 this) (NN_2 lesson)) (VP_4 (VBD_1 was) (VP_2 (ATVP_2 (VBD_1 had) (S_2 (NP_1 (ATNP_0 (PRPDOLLAR_0 his) (NNS_0 calculations)) (S_2 (NP_2 (CD_0 one)) (ADJP_0 (JJ_0 tall)))) (VP_0 (TO_0 to) (VP_1 (ADVP_0 (RB_0 together)) (VBD_1 was))))) (ADVP_0 (IN_2 outside) (RB_1 n<apostrophe>t))))) (DOT_0 .)))