A female may tighten muscles.Logical formLearned from19 sentences. A smile may tighten.Logical formLearned from19 sentences. A male may tighten around a person.Logical formLearned from19 sentences. Regulations may be tightened.Logical formLearned from19 sentences. A (credit market) may tighten.Logical formLearned from19 sentences. Global warming may tighten a grip.Logical formLearned from19 sentences. A grip may tighten on an arm.Logical formLearned from19 sentences. An international-political-entity may tighten (trade sanctions).Logical formLearned from19 sentences. Pressure may tighten.Logical formLearned from19 sentences. A government may tighten regulations.Logical formLearned from19 sentences. A country may tighten a blockade.Logical formLearned from19 sentences. A country may tighten a control.Logical formLearned from19 sentences. Rules may be tightened after some massacres.Logical formLearned from19 sentences. Lending may tighten.Logical formLearned from19 sentences. Bolts may be tightened.Logical formLearned from19 sentences.