Development of a civilization may depend on access to energy.Logical formLearned from6 sentences. A context may pertain-to a civilization.Logical formLearned from6 sentences. Civilization may undergo an acceptance.Logical formLearned from6 sentences. Persons can be in a clash of civilizations.Logical formLearned from6 sentences. Civilization can be in locations.Logical formLearned from6 sentences. Civilization may undergo underpinnings.Logical formLearned from6 sentences. Civilization can be on earth.Logical formLearned from6 sentences. (Civilization sites) may pertain-to a river.Logical formLearned from6 sentences. Western civilization may undergo an expansion.Logical formLearned from6 sentences. Civilization can be advanced.Logical formLearned from6 sentences. A factor can be in civilization.Logical formLearned from6 sentences. Relation can be to civilizations.Logical formLearned from6 sentences. Dolls may battle for survival of civilization.Logical formLearned from6 sentences. A spot of civilization may have a share of destruction.Logical formLearned from6 sentences. 1500s may undergo a civilization.Logical formLearned from6 sentences.