A sandstone can be gray.Logical formLearned from66 sentences. A material can be gray.Logical formLearned from65 sentences. Sweats can be gray.Logical formLearned from65 sentences. Streets can be gray.Logical formLearned from64 sentences. A place can be gray.Logical formLearned from64 sentences. An image can be gray.Logical formLearned from64 sentences. An area can be gray.Logical formLearned from63 sentences. (Sweat pants) can be gray.Logical formLearned from63 sentences. A woman can be with gray hair.Logical formLearned from62 sentences. Air can be gray.Logical formLearned from62 sentences. The world can be gray.Logical formLearned from62 sentences. A head can be constituted-of-or-filled-with gray hair.Logical formLearned from61 sentences. Persons can be gray.Logical formLearned from61 sentences. Light can be gray.Logical formLearned from61 sentences. A gown can be gray.Logical formLearned from60 sentences.