A sign can be constituted-of-or-filled-with civilisation.Logical formLearned from2 sentences. Civilisation can be in a continent.Logical formLearned from2 sentences. A time may undergo a civilisation.Logical formLearned from2 sentences. Civilisations can be with origins.Logical formLearned from1 sentences. Civilisations may fumble with ideas.Logical formLearned from1 sentences.