They should here fell was in back .
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 They)) (VP_4 (ATVP_1 (MD_0 should) (ADVP_0 (RB_0 here))) (VP_5 (VBD_2 fell) (S_2 (VP_0 (VBD_0 was) (PP_1 (IN_1 in) (NP_2 (RB_1 back)))))))) (DOT_0 .)))