I want to know the answer to the following question:
What year were hops first believed to be added to beer?
All the background I'm provided with is that "What they did not contain was hops, as that was a later addition, first mentioned in Europe around 822 by a Carolingian Abbot and again in 1067 by Abbess Hildegard of Bingen.". Is that enough to answer the question?
Answer: yes