An end of civilization can be nigh.Logical formLearned from9 sentences. Civilization may undergo an arrival.Logical formLearned from9 sentences. A civilization can be little-known.Logical formLearned from9 sentences. Civilizations can be literate.Logical formLearned from9 sentences. A nineteenth century may undergo a civilization.Logical formLearned from9 sentences. Contributions can be to western civilization.Logical formLearned from9 sentences. A clash can be about civilization.Logical formLearned from9 sentences. Contact can be with a civilization.Logical formLearned from9 sentences. Discontents may pertain-to civilization.Logical formLearned from9 sentences. Early civilizations may undergo a rise.Logical formLearned from9 sentences. Civilization may rise.Logical formLearned from9 sentences. Civilizations may pertain-to mankind.Logical formLearned from9 sentences. A civilization can be victorian.Logical formLearned from9 sentences. A division of labor can be a basis of modern civilization.Logical formLearned from9 sentences. Civilization may undergo clashes.Logical formLearned from9 sentences.