Question: In what year was the abbess who wrote the biography of Bertha of Bingen born?
Sentence (from "Hildegard of Bingen"): Hildegard of Bingen, O.S.B. (German: "Hildegard von Bingen" ; ; 1098 – 17 September 1179), also known as Saint Hildegard and Sibyl of the Rhine, was a German Benedictine abbess, writer, composer, philosopher, Christian mystic, visionary, and polymath.
Relevant evidence: Yes