Complex sentence: On the morning of 16 April 2007, whilst she working illegally for Carla Connor in the factory, Kasia trips whilst carrying a stack of boxes and falls down a flight of stairs, and dies from the injuries she sustains.
Split into simpler sentences: On the morning of 16 April 2007, she is involved in an accident whilst working illegally for Carla Connor in the factory. She trips whilst carrying a stack of boxes and falls down a flight of stairs, dying from the injuries she sustains.