300words discussion

For this paper, provide:1) a concise yet thorough description of the key question that was addressed by the authors and 2)a novel question that either the authors did not address but should have, or that occurred to you after having read the paper. This should be a novel insight that might improve the paper's impact, clarify a concept, or address a key/ new issue that was not directly addressed in the original discussion paper, limit ~ 300 words( the article provide in the upload file)