Gray hairs can be on a head.Logical formLearned from12 sentences. A bunny can be gray.Logical formLearned from12 sentences. An (eye shadow) can be gray.Logical formLearned from12 sentences. Ovals can be gray.Logical formLearned from12 sentences. A teen can be gray.Logical formLearned from12 sentences. A suitcase can be gray.Logical formLearned from12 sentences. A gray hair can be stringy.Logical formLearned from12 sentences. A hint can be gray.Logical formLearned from12 sentences. A lump can be gray.Logical formLearned from12 sentences. Paintings can be gray.Logical formLearned from12 sentences. A tombstone can be gray.Logical formLearned from12 sentences. A front can be gray.Logical formLearned from12 sentences. An exterior can be gray.Logical formLearned from12 sentences. A gray area can be in a country.Logical formLearned from12 sentences. A (wool coat) can be gray.Logical formLearned from12 sentences.