A blockade may tighten.Logical formLearned from7 sentences. A government may tighten.Logical formLearned from7 sentences. Security may be tightened in public places.Logical formLearned from7 sentences. A central bank may tighten controls.Logical formLearned from7 sentences. Fundamentals may tighten.Logical formLearned from7 sentences. (Membership criteria) may tighten.Logical formLearned from7 sentences. A lebanese army may tighten a noose.Logical formLearned from7 sentences. A noose may tighten on al-zarqawi.Logical formLearned from7 sentences. Persons may tighten a defense.Logical formLearned from7 sentences. A country may tighten (visa regulations).Logical formLearned from7 sentences. Firms may tighten belts.Logical formLearned from7 sentences. Rebels may tighten a grip.Logical formLearned from7 sentences. A law may tighten an embargo on a country.Logical formLearned from7 sentences. Security may be tightened around an embassy.Logical formLearned from7 sentences. Security may be tightened across a country.Logical formLearned from7 sentences.