An international community may tighten sanctions on a country.Logical formLearned from6 sentences. Persons may tighten (safety surveillance).Logical formLearned from6 sentences. A chinese government may tighten (safety provisions).Logical formLearned from6 sentences. Security may tighten in a world-city.Logical formLearned from6 sentences. Persons may tighten supervision.Logical formLearned from6 sentences. A central bank may tighten rules.Logical formLearned from6 sentences. A government may tighten a security.Logical formLearned from6 sentences. A country may tighten supervision.Logical formLearned from6 sentences. A state may tighten control.Logical formLearned from6 sentences. (Consumer credit) may tighten.Logical formLearned from6 sentences. Reins may be tightened.Logical formLearned from6 sentences. A person may tighten strings.Logical formLearned from6 sentences. A border may be tightened.Logical formLearned from6 sentences. Legislation may tighten control.Logical formLearned from6 sentences. Banks may tighten (underwriting standards).Logical formLearned from6 sentences.