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(ROOT_0 (S_0 (ATS_3 (ATS_1 (TICK_0 ``) (NP_1 (PRP_0 It))) (VP_3 (VBD_1 heard) (VP_2 (ATVP_4 (VBD_0 were) (ADJP_0 (JJ_0 green))) (PP_2 (IN_0 At) (NP_3 (ATNP_0 (NP_0 (PRP_1 they)) (COMMA_0 ,)) (NNS_0 cheeks)))))) (DOT_0 .)))