Complex sentence: The festival was established in 1824 to support the ongoing construction of the Norfolk & Norwich Hospital, and grew out of earlier musical fundraisers for the hospital dating back as far as 1772 including the annual performance of an oratorio at Norwich Cathedral.
Split into simpler sentences: The festival was established in 1824 to support the ongoing construction of the Norfolk & Norwich Hospital. It grew out of earlier musical fundraisers for the hospital including the annual performance of an oratorio at Norwich Cathedral.