`` They happened down and it sounded .
(ROOT_0 (S_0 (ATS_3 (ATS_4 (ATS_0 (TICK_0 ``) (S_1 (NP_1 (PRP_0 They)) (VP_5 (VBD_0 happened) (PRT_0 (RP_0 down))))) (CC_0 and)) (S_1 (NP_0 (PRP_1 it)) (VP_5 (VBD_1 sounded)))) (DOT_0 .)))