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(ROOT_0 (S_0 (ATS_3 (ATS_1 (TICK_0 ``) (NP_1 (PRP_0 They))) (VP_3 (ATVP_1 (VBD_0 discovered) (RB_1 Then)) (VP_1 (VB_0 give) (NP_3 (NN_0 knit) (NNS_1 songs))))) (DOT_0 .)))