(Spiral staircase) may lead_down into a basement.Logical formLearned from4 sentences. A spiral can be into collapse.Logical formLearned from4 sentences. A person may watch a downward spiral of empire.Logical formLearned from4 sentences. A spiral can be constituted-of-or-filled-with decay.Logical formLearned from4 sentences. Spirals can be constituted-of-or-filled-with decline.Logical formLearned from4 sentences. An edge may pertain-to a spiral.Logical formLearned from4 sentences. A real-estate market may sink into a downward spiral.Logical formLearned from4 sentences. A (death spiral) may pertain-to a company.Logical formLearned from4 sentences. (Spiral whorls) can be constituted-of-or-filled-with leaves.Logical formLearned from4 sentences. A pattern can be constituted-of-or-filled-with spirals.Logical formLearned from4 sentences. A (spiral shell) can be flattened.Logical formLearned from4 sentences. A state can be in a (death spiral).Logical formLearned from4 sentences. A catalyst may set_off a spiral.Logical formLearned from4 sentences. A (spiral fracture) may pertain-to a right tibia.Logical formLearned from4 sentences. A downward spiral can be difficult.Logical formLearned from4 sentences.