A shading can be gray.Logical formLearned from81 sentences. A limestone can be gray.Logical formLearned from80 sentences. A mud can be gray.Logical formLearned from80 sentences. Patches can be gray.Logical formLearned from79 sentences. A person may have gray hair.Logical formLearned from79 sentences. A wig can be gray.Logical formLearned from78 sentences. Shirts can be gray.Logical formLearned from76 sentences. A mouse can be gray.Logical formLearned from76 sentences. A tone can be gray.Logical formLearned from76 sentences. A cap can be gray.Logical formLearned from75 sentences. A rubble can be gray.Logical formLearned from73 sentences. Skin can be gray.Logical formLearned from73 sentences. A sea can be gray.Logical formLearned from71 sentences. Streaks can be gray.Logical formLearned from70 sentences. A surface can be gray.Logical formLearned from70 sentences.