A period can be prolonged.Logical formLearned from4 443 sentences. Periods can be prolonged.Logical formLearned from2 745 sentences. Exposure can be prolonged.Logical formLearned from2 438 sentences. A drought can be prolonged.Logical formLearned from1 932 sentences. A use can be prolonged.Logical formLearned from1 608 sentences. A recession can be prolonged.Logical formLearned from1 159 sentences. A slump can be prolonged.Logical formLearned from1 092 sentences. A war can be prolonged.Logical formLearned from951 sentences. An illness can be prolonged.Logical formLearned from844 sentences. An absence can be prolonged.Logical formLearned from798 sentences. A detention can be prolonged.Logical formLearned from728 sentences. A crisis can be prolonged.Logical formLearned from684 sentences. A conflict can be prolonged.Logical formLearned from593 sentences. A battle can be prolonged.Logical formLearned from531 sentences. A strike can be prolonged.Logical formLearned from531 sentences.