A horizon can be gray.Logical formLearned from34 sentences. A part can be gray.Logical formLearned from33 sentences. Walls can be gray.Logical formLearned from33 sentences. A gray matter may pertain-to a brain.Logical formLearned from33 sentences. A hue can be gray.Logical formLearned from33 sentences. Mists can be gray.Logical formLearned from33 sentences. Accents can be gray.Logical formLearned from33 sentences. Hues can be gray.Logical formLearned from33 sentences. Rectangles can be gray.Logical formLearned from33 sentences. Shingles can be gray.Logical formLearned from33 sentences. A base can be gray.Logical formLearned from32 sentences. A soot can be gray.Logical formLearned from32 sentences. A pair can be gray.Logical formLearned from32 sentences. A (suit jacket) can be gray.Logical formLearned from32 sentences. A rabbit can be gray.Logical formLearned from31 sentences.