Some signs can be constituted-of-or-filled-with civilization.Logical formLearned from9 sentences. Origins can be constituted-of-or-filled-with civilization.Logical formLearned from9 sentences. Civilization may undergo an expansion.Logical formLearned from9 sentences. A civilization may stagnate.Logical formLearned from9 sentences. A civilization can be supposed.Logical formLearned from9 sentences. Civilization can be in peril.Logical formLearned from9 sentences. A civilization can be strong.Logical formLearned from9 sentences. Remains may pertain-to civilizations.Logical formLearned from9 sentences. A civilization may develop.Logical formLearned from9 sentences. Civilization may be saved.Logical formLearned from9 sentences. Civilizations may be developed.Logical formLearned from9 sentences. A new type can be constituted-of-or-filled-with civilization.Logical formLearned from9 sentences. A civilization can be in a stage.Logical formLearned from9 sentences. A debt may pertain-to civilization.Logical formLearned from9 sentences. Remnants can be constituted-of-or-filled-with ancient civilizations.Logical formLearned from9 sentences.