A (metal desk) can be gray.Logical formLearned from12 sentences. Stumps can be gray.Logical formLearned from12 sentences. A (sport coat) can be gray.Logical formLearned from12 sentences. A propriety can be gray.Logical formLearned from12 sentences. Hands can be gray.Logical formLearned from12 sentences. Outdoors can be gray.Logical formLearned from12 sentences. A page can be gray.Logical formLearned from12 sentences. A (border material) can be gray.Logical formLearned from12 sentences. An (ice bucket) can be gray.Logical formLearned from12 sentences. Gray hairs can be on a head.Logical formLearned from12 sentences. (Contact lenses) may turn gray eyes.Logical formLearned from12 sentences. A stetson can be gray.Logical formLearned from12 sentences. A waffle can be gray.Logical formLearned from12 sentences. A book can be gray.Logical formLearned from12 sentences. Ribbons can be gray.Logical formLearned from12 sentences.