the sturdy idiom had forward the only one .
(ROOT_0 (S_0 (ATS_3 (NP_1 (ATNP_1 (DT_0 the) (JJ_1 sturdy)) (NN_0 idiom)) (VP_4 (ATVP_0 (VBD_2 had) (ADVP_0 (RB_0 forward))) (NP_6 (ATNP_1 (DT_0 the) (JJ_1 only)) (NN_1 one)))) (DOT_0 .)))