IDFによれば、封鎖は状況の評価が変わるまで続く。
(S (S (PP (BASENP (NNP ＩＤＦ)) (INP (IN に) (VB よれ) (INCON ば))) (COMMA 、) (S (PP-SBJ (BASENP (NN 封鎖)) (IN は)) (VP (PRN (SBAR (S (PP-SBJ (NP (PP (BASENP (NN 状況)) (IN の)) (NN 評価)) (IN が)) (VP (VB 変わる))) (IN まで))) (VB 続く)))) (PERIOD 。))