A layer can be constituted-of-or-filled-with gray matter.Logical formLearned from8 sentences. A heart can be gray.Logical formLearned from8 sentences. A (granite building) can be gray.Logical formLearned from8 sentences. Arrows can be gray.Logical formLearned from8 sentences. An (arrow button) can be gray.Logical formLearned from8 sentences. Dreadlocks can be gray.Logical formLearned from8 sentences. A gray hair may be combed.Logical formLearned from8 sentences. A (paint scheme) can be gray.Logical formLearned from8 sentences. Tables can be gray.Logical formLearned from8 sentences. A lick can be gray.Logical formLearned from8 sentences. Gray eyes may be answered.Logical formLearned from8 sentences. A hope can be gray.Logical formLearned from8 sentences. A thoroughbred can be gray.Logical formLearned from8 sentences. Gray areas can be between a church.Logical formLearned from8 sentences. Nuances may create gray areas.Logical formLearned from8 sentences.