A country may tighten.Logical formLearned from25 sentences. Security may be tightened in a capital.Logical formLearned from25 sentences. A world-city may tighten a monetary policy.Logical formLearned from25 sentences. A net may tighten.Logical formLearned from25 sentences. A security may be tightened.Logical formLearned from24 sentences. A country may tighten a siege.Logical formLearned from24 sentences. Authorities may tighten (security measures).Logical formLearned from24 sentences. Persons may tighten.Logical formLearned from24 sentences. A male may tighten around a male.Logical formLearned from24 sentences. A face may be tightened.Logical formLearned from24 sentences. Lips may tighten into a line.Logical formLearned from24 sentences. Screws may tighten.Logical formLearned from24 sentences. A male may tighten a belt.Logical formLearned from24 sentences. Israeli troops may tighten blockades of towns.Logical formLearned from24 sentences. A world-city may tighten control.Logical formLearned from23 sentences.