Also, Simova discovered the truth about the wartime atrocities almost immediately afterward, including her own parents' deaths in Auschwitz.
Simova discovered that her parents died in Auschwitz. 
mnli hypothesis: Simova discovered that her parents died in Auschwitz.  premise: Also, Simova discovered the truth about the wartime atrocities almost immediately afterward, including her own parents' deaths in Auschwitz.