A frame can be gray.Logical formLearned from22 sentences. Some black birds can be gray.Logical formLearned from22 sentences. A person may get gray hair.Logical formLearned from22 sentences. A bill can be gray.Logical formLearned from22 sentences. Thoughts can be gray.Logical formLearned from22 sentences. A desk can be gray.Logical formLearned from22 sentences. (Cloth seats) can be gray.Logical formLearned from22 sentences. An elephant can be gray.Logical formLearned from22 sentences. A yarn can be gray.Logical formLearned from22 sentences. Lenses can be gray.Logical formLearned from22 sentences. A morning can be gray.Logical formLearned from22 sentences. Stockings can be gray.Logical formLearned from22 sentences. Masses can be gray.Logical formLearned from22 sentences. A tweed can be gray.Logical formLearned from22 sentences. Skirts can be gray.Logical formLearned from22 sentences.