An army may tighten security.Logical formLearned from19 sentences. A country may tighten (immigration laws).Logical formLearned from19 sentences. A US-city may tighten sanctions.Logical formLearned from19 sentences. A government may tighten rules.Logical formLearned from19 sentences. An army may tighten a noose.Logical formLearned from19 sentences. Authorities may tighten controls.Logical formLearned from18 sentences. A country may tighten a security.Logical formLearned from18 sentences. Police may tighten (security measures).Logical formLearned from18 sentences. A female may tighten lips.Logical formLearned from18 sentences. Hands may tighten on a (steering wheel).Logical formLearned from18 sentences. (Border security) may tighten.Logical formLearned from18 sentences. Skin may be tightened.Logical formLearned from18 sentences. An arm may tighten around a person.Logical formLearned from18 sentences. A country may tighten borders.Logical formLearned from18 sentences. Forces may tighten a noose.Logical formLearned from18 sentences.