Complex sentence: The Institute of Nuclear Materials Management (INMM) is an international technical and professional organization that works to promote safe handling of nuclear material and the safe practice of nuclear materials management through publications, as well as organized presentations and meetings.
Split into simpler sentences: The Institute of Nuclear Materials Management (INMM) is a technical and professional organization dedicated to the safe handling of nuclear material throughout the world. It is an international organization that works to promote the safe practice of nuclear materials management through publications, as well as organized presentations and meetings.