Investigations can be prolonged.Logical formLearned from30 sentences. An economic boom can be prolonged.Logical formLearned from30 sentences. A criticism can be prolonged.Logical formLearned from30 sentences. A breast-feeding can be prolonged.Logical formLearned from30 sentences. A (bombing campaign) can be prolonged.Logical formLearned from30 sentences. Blackouts can be prolonged.Logical formLearned from30 sentences. A famine can be prolonged.Logical formLearned from30 sentences. An intake can be prolonged.Logical formLearned from29 sentences. An inhalation can be prolonged.Logical formLearned from29 sentences. A response can be prolonged.Logical formLearned from29 sentences. A moment can be prolonged.Logical formLearned from29 sentences. (Drought conditions) can be prolonged.Logical formLearned from29 sentences. Deaths can be prolonged.Logical formLearned from29 sentences. A (security closure) can be prolonged.Logical formLearned from29 sentences. Closures can be prolonged.Logical formLearned from29 sentences.