Complex sentence: It is currently one of the most prolific telescope in the world discovering near-Earth Objects, ranking fourth on the Minor Planet Center's discovery chart with a total of 39,274 numbered minor planets, as of Semptember 2015.
Split into simpler sentences: It is currently one of the most prolific surveys worldwide, especially for discovering near-Earth Objects. MLS ranks fourth on the Minor Planet Center's discovery chart with a total of 39,274 numbered minor planets, as of Semptember 2015.