(Opera houses) can be in a continent.Logical formLearned from33 sentences. A tree can be in a continent.Logical formLearned from33 sentences. A continent can be unexplored.Logical formLearned from33 sentences. Trafficking can be in a continent.Logical formLearned from33 sentences. A track may pertain-to a continent.Logical formLearned from33 sentences. (Growth rates) can be in a continent.Logical formLearned from33 sentences. A surface may pertain-to a continent.Logical formLearned from33 sentences. An outbreak can be in a continent.Logical formLearned from33 sentences. Modern humans can be in a continent.Logical formLearned from33 sentences. Democratization can be in a continent.Logical formLearned from33 sentences. Migration can be in a continent.Logical formLearned from33 sentences. Some societies can be in a continent.Logical formLearned from33 sentences. A total liberation may pertain-to a continent.Logical formLearned from33 sentences. Sites can be throughout a continent.Logical formLearned from33 sentences. Some conflicts can be in a continent.Logical formLearned from33 sentences.