Question: In what year was a commander of Ergänzungs-Jagdgruppe Ost who claimed a total of 212 aerial victories born?
Sentence (from "Ergänzungs-Jagdgruppe Ost"): Ergänzungs-Jagdgruppe Ost" (EJGr Ost) (Supplementary Fighter Group, East) was a fighter pilot training unit of the German Luftwaffe in World War II.
Relevant evidence: Yes