Complex sentence: After Alf's party, Chloe was involved in car crash with several Summer Bay residents and was rushed into theatre but nothing could be done, as Chloe had died in theatre from an embolism caused by her broken arm.
Split into simpler sentences: After Alf's party, Chloe was involved in car crash along with several Summer Bay residents. Chloe died in theatre from an embolism caused by her broken arm.