`` this lisp were back and keep .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (TICK_0 ``) (NP_1 (DT_1 this) (NN_2 lisp))) (VP_3 (ATVP_1 (VP_5 (VBD_0 were) (PRT_0 (RP_0 back))) (CC_0 and)) (VP_1 (VB_0 keep)))) (DOT_0 .)))