Complex sentence: The 2016--17 UEFA Futsal Cup was the 31st edition of Europe's premier club futsal tournament, and the 16th edition under the current UEFA Futsal Cup format organized by UEFA.
Split into simpler sentences: The 2016--17 UEFA Futsal Cup was the 31st edition of Europe's premier club futsal tournament. This was the 16th edition under the current UEFA Futsal Cup format organized by UEFA.