A civilization can be secular.Logical formLearned from16 sentences. Contact can be with millions of civilizations.Logical formLearned from16 sentences. A civilization can be advanced.Logical formLearned from16 sentences. A study can be constituted-of-or-filled-with civilization.Logical formLearned from16 sentences. A danger can be to civilization.Logical formLearned from16 sentences. Civilizations can be throughout history.Logical formLearned from16 sentences. A capital may pertain-to a civilization.Logical formLearned from16 sentences. Conflict can be between civilizations.Logical formLearned from16 sentences. Remnants may pertain-to a civilization.Logical formLearned from16 sentences. Civilization may undergo a flowering.Logical formLearned from16 sentences. Dialogues can be between civilizations.Logical formLearned from15 sentences. A cradle can be constituted-of-or-filled-with chinese civilization.Logical formLearned from15 sentences. A civilization may be developed.Logical formLearned from15 sentences. Elements can be constituted-of-or-filled-with civilization.Logical formLearned from15 sentences. A core may pertain-to a civilization.Logical formLearned from15 sentences.