An army may tighten a blockade.Logical formLearned from10 sentences. Security may be tightened at an airport.Logical formLearned from10 sentences. A time may tighten a noose on transactions.Logical formLearned from10 sentences. A national-agency may tighten (credit conditions).Logical formLearned from10 sentences. Banks may tighten criteria.Logical formLearned from10 sentences. A race may tighten from a lead to a gap.Logical formLearned from10 sentences. A person may tighten a seatbelt.Logical formLearned from10 sentences. Policies may tighten.Logical formLearned from10 sentences. Firefighters may tighten a grip on wildfires.Logical formLearned from10 sentences. A country may tighten laws.Logical formLearned from10 sentences. (Security measures) may be tightened throughout a metro.Logical formLearned from10 sentences. A siege may be tightened.Logical formLearned from9 sentences. Persons may tighten laws.Logical formLearned from9 sentences. Legislation may tighten an embargo.Logical formLearned from9 sentences. Authorities may tighten regulations.Logical formLearned from9 sentences.