Complex sentence: In 2016, the IAU organized a Working Group on Star Names (WGSN) which will catalog cultural and historical names for bright stars to help preserve astronomical world heritage, and maintain a catalog of IAU-approved unique proper names for stars.
Split into simpler sentences: In 2016, the IAU organized a (WGSN) to catalog cultural and historical names for bright stars to help preserve astronomical world heritage. The WGSN will also maintain a catalog of IAU-approved unique proper names for stars.