A contact can be prolonged.Logical formLearned from463 sentences. Negotiations can be prolonged.Logical formLearned from394 sentences. A debate can be prolonged.Logical formLearned from382 sentences. A struggle can be prolonged.Logical formLearned from380 sentences. A downturn can be prolonged.Logical formLearned from357 sentences. A stay can be prolonged.Logical formLearned from341 sentences. An economic slump can be prolonged.Logical formLearned from335 sentences. A treatment can be prolonged.Logical formLearned from289 sentences. Stress can be prolonged.Logical formLearned from284 sentences. Droughts can be prolonged.Logical formLearned from259 sentences. An applause can be prolonged.Logical formLearned from257 sentences. An economic downturn can be prolonged.Logical formLearned from252 sentences. A process can be prolonged.Logical formLearned from246 sentences. A campaign can be prolonged.Logical formLearned from244 sentences. Survival can be prolonged.Logical formLearned from244 sentences.