A standoff can be prolonged.Logical formLearned from222 sentences. An economic crisis can be prolonged.Logical formLearned from220 sentences. A dispute can be prolonged.Logical formLearned from220 sentences. A fight can be prolonged.Logical formLearned from217 sentences. A slowdown can be prolonged.Logical formLearned from214 sentences. A siege can be prolonged.Logical formLearned from210 sentences. An occupation can be prolonged.Logical formLearned from205 sentences. A civil war can be prolonged.Logical formLearned from204 sentences. A weakness can be prolonged.Logical formLearned from202 sentences. A dry spell can be prolonged.Logical formLearned from200 sentences. A decline can be prolonged.Logical formLearned from199 sentences. A time can be prolonged.Logical formLearned from195 sentences. A (housing slump) can be prolonged.Logical formLearned from191 sentences. A therapy can be prolonged.Logical formLearned from186 sentences. A silence can be prolonged.Logical formLearned from183 sentences.