Some books can be about (American civilization).Logical formLearned from5 sentences. Troops may march through a cradle of western civilization.Logical formLearned from5 sentences. Civilizations may manifest connectedness.Logical formLearned from5 sentences. Progress can be in ridding the world of a threat to civilization.Logical formLearned from5 sentences. A dialogue can be between civilizations.Logical formLearned from5 sentences. Civilizations can be in a continent.Logical formLearned from5 sentences. Parts can be constituted-of-or-filled-with civilization.Logical formLearned from5 sentences. Persons can be sumerians of a civilization.Logical formLearned from5 sentences. Sumerians may pertain-to a civilization.Logical formLearned from5 sentences. Western civilization may undergo accomplishments.Logical formLearned from5 sentences. Western civilization may undergo an arrival.Logical formLearned from5 sentences. Weapons may wipe_out a civilization.Logical formLearned from5 sentences. A civilization can be worthy of a person.Logical formLearned from5 sentences. Civilizations can be stagnant.Logical formLearned from5 sentences. Civilizations may recover a vitality.Logical formLearned from5 sentences.