Question: What is the date of death of Johan Frederik Schlegel's wife?
Sentence (from "Regine Olsen"): Regine Schlegel (née Olsen; January 23, 1822 – March 18, 1904) was a Danish woman who was engaged to the philosopher and theologian Søren Kierkegaard from September 1840 to October 1841.
Relevant evidence: Yes