A gradient can be plain.Logical formLearned from6 sentences. A landscape can be plain.Logical formLearned from6 sentences. A wilderness can be plain.Logical formLearned from6 sentences. A prism can be plain.Logical formLearned from6 sentences. Chords can be plain.Logical formLearned from6 sentences. A marble can be plain.Logical formLearned from6 sentences. Blankets can be plain.Logical formLearned from6 sentences. A plain language may pertain-to a clause.Logical formLearned from6 sentences. A heaven can be plain.Logical formLearned from6 sentences. Headstones can be plain.Logical formLearned from6 sentences. A diction can be plain.Logical formLearned from6 sentences. (Chest x-rays) can be plain.Logical formLearned from6 sentences. Monuments can be plain.Logical formLearned from6 sentences. Cuffs can be plain.Logical formLearned from6 sentences. Roofs can be plain.Logical formLearned from6 sentences.