Curtains can be gray.Logical formLearned from20 sentences. A gray area can be in a law.Logical formLearned from20 sentences. A mop can be gray.Logical formLearned from20 sentences. A (wool suit) can be gray.Logical formLearned from20 sentences. A hearse can be gray.Logical formLearned from20 sentences. A gray hair can be premature.Logical formLearned from20 sentences. A (question mark) can be gray.Logical formLearned from20 sentences. (Wool pants) can be gray.Logical formLearned from20 sentences. A pinstripe can be gray.Logical formLearned from20 sentences. A past can be gray.Logical formLearned from20 sentences. An aircraft can be gray.Logical formLearned from20 sentences. A land can be gray.Logical formLearned from20 sentences. A plane can be gray.Logical formLearned from20 sentences. A mantle can be gray.Logical formLearned from19 sentences. A coloring can be gray.Logical formLearned from19 sentences.