A civilization can be decadent.Logical formLearned from17 sentences. Extraterrestrial civilizations can be in the universe.Logical formLearned from17 sentences. A menace can be to civilization.Logical formLearned from17 sentences. Civilizations may collapse.Logical formLearned from17 sentences. A civilization may undergo a building.Logical formLearned from17 sentences. A civilization can be literate.Logical formLearned from17 sentences. Cities may pertain-to a civilization.Logical formLearned from17 sentences. A civilization can be in the world.Logical formLearned from17 sentences. Civilizations may flourish.Logical formLearned from17 sentences. A civilization may be lost.Logical formLearned from17 sentences. A state may pertain-to a civilization.Logical formLearned from17 sentences. A civilization can be forgotten.Logical formLearned from17 sentences. A civilization may undergo construction.Logical formLearned from16 sentences. Dialogues can be among civilizations.Logical formLearned from16 sentences. Contributions can be to human civilization.Logical formLearned from16 sentences.