A (patriot system) may fail.Logical formLearned from10 sentences. Some tires may fail.Logical formLearned from10 sentences. Schools may fail some years.Logical formLearned from10 sentences. Clashes may fail.Logical formLearned from10 sentences. Persons may fail trust.Logical formLearned from10 sentences. Schools may fail children.Logical formLearned from10 sentences. A player may fail a test.Logical formLearned from10 sentences. Games may fail.Logical formLearned from10 sentences. Some years of efforts may fail.Logical formLearned from10 sentences. A no-confidence motion may fail.Logical formLearned from10 sentences. Truces may fail.Logical formLearned from10 sentences. An (aviation authority) may fail (safety standards).Logical formLearned from10 sentences. A country may fail in an effort.Logical formLearned from10 sentences. A round of negotiations may fail.Logical formLearned from10 sentences. Cease-fires may fail.Logical formLearned from10 sentences.