then that ditch would doing on houses .
(ROOT_0 (S_0 (ATS_3 (ATS_1 (ADVP_0 (RB_0 then)) (NP_0 (DT_1 that) (NN_2 ditch))) (VP_3 (MD_0 would) (VP_1 (ATVP_0 (VBG_0 doing) (PRT_0 (RP_0 on))) (NP_3 (NNS_1 houses))))) (DOT_0 .)))