A crisis may challenge a civilization.Logical formLearned from5 sentences. Clues can be to a development of chinese civilization.Logical formLearned from5 sentences. Assault can be against human rights of civilization.Logical formLearned from5 sentences. An (opening ceremony) may showcase an ancient civilization to the world.Logical formLearned from5 sentences. A civilization can be worthy of a name.Logical formLearned from5 sentences. Some books can be on civilization.Logical formLearned from5 sentences. A cornerstone may pertain-to a civilization.Logical formLearned from5 sentences. A triumph may pertain-to civilization.Logical formLearned from5 sentences. A clash can be within a civilization.Logical formLearned from5 sentences. A country may cultivate civilizations.Logical formLearned from4 sentences. Some civilizations may meet.Logical formLearned from4 sentences. Contributions can be to progress of human civilization.Logical formLearned from4 sentences. Learning can be among civilizations.Logical formLearned from4 sentences. Interactions can be between civilizations.Logical formLearned from4 sentences. A country can be constituted-of-or-filled-with civilization.Logical formLearned from4 sentences.