A return may pertain-to a phenomenon.Logical formLearned from8 sentences. A (stock market phenomenon) can be in 1990s.Logical formLearned from8 sentences. A (voter turnout) can be an indicator of a phenomenon.Logical formLearned from8 sentences. A (weather phenomenon) may cause dry weather.Logical formLearned from8 sentences. Politics can be a phenomenon.Logical formLearned from8 sentences. Heavy rains may be attributed to a (weather phenomenon).Logical formLearned from8 sentences. Persons can be aware of a phenomenon.Logical formLearned from8 sentences. A phenomenon can be clear.Logical formLearned from8 sentences. A (weather phenomenon) can be rare.Logical formLearned from8 sentences. A phenomenon can be theoretical.Logical formLearned from8 sentences. A phenomenon may pertain-to a criminal-organization.Logical formLearned from8 sentences. A phenomenon may require efforts.Logical formLearned from8 sentences. An (immigration phenomenon) can be illegal.Logical formLearned from8 sentences. A fall can be a phenomenon.Logical formLearned from8 sentences. A phenomenon may occur some years.Logical formLearned from8 sentences.