A mass can be constituted-of-or-filled-with gray matter.Logical formLearned from9 sentences. A terrain can be gray.Logical formLearned from9 sentences. A mountain can be gray.Logical formLearned from9 sentences. A house can be gray.Logical formLearned from9 sentences. Bones can be gray.Logical formLearned from9 sentences. A gray hair can be spiky.Logical formLearned from9 sentences. A mark can be gray.Logical formLearned from9 sentences. A cape can be gray.Logical formLearned from9 sentences. A canopy can be gray.Logical formLearned from9 sentences. An african gray parrot can be chatty.Logical formLearned from9 sentences. A gray area may involve an oath.Logical formLearned from9 sentences. A weekend can be gray.Logical formLearned from9 sentences. A gladiator can be gray.Logical formLearned from9 sentences. Gray whales can be migratory.Logical formLearned from9 sentences. A region can be constituted-of-or-filled-with gray matter.Logical formLearned from9 sentences.