A black bag can be plain.Logical formLearned from4 sentences. A male may speak in plain language.Logical formLearned from4 sentences. A pancake can be plain.Logical formLearned from4 sentences. Novels can be plain.Logical formLearned from4 sentences. A ponytail can be plain.Logical formLearned from4 sentences. A catgut can be plain.Logical formLearned from4 sentences. A killing can be plain.Logical formLearned from4 sentences. Dresses can be plain.Logical formLearned from4 sentences. A change can be plain.Logical formLearned from4 sentences. (Gas bills) can be plain.Logical formLearned from4 sentences. An outline can be plain.Logical formLearned from4 sentences. A coffee-shop can be plain.Logical formLearned from4 sentences. Khakis can be plain.Logical formLearned from4 sentences. A trade can be plain.Logical formLearned from4 sentences. A reply can be plain.Logical formLearned from4 sentences.