Complex sentence: Lee Weathers (Kate Mara), a stern and self-contained young woman, is a risk-assessment specialist from a company that funds research projects devoted to creating artificial human beings who is called in to investigate an incident involving one of their experiments.
Split into simpler sentences: Lee Weathers (Kate Mara), a stern and self-contained young woman, is a risk-assessment specialist from a company that funds research projects devoted to creating artificial human beings. She is called in to investigate an incident involving one of their experiments.