again they had then never sounded .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ADVP_0 (RB_0 again)) (NP_0 (PRP_1 they))) (VP_3 (ATVP_1 (VBD_1 had) (ADVP_0 (RB_0 then))) (VP_1 (ADVP_0 (RB_0 never)) (VBD_1 sounded)))) (DOT_0 .)))