Opera Parallèle has announced its 2019-20 season. It all kicks off with “Bill and Flicka: Generous Spirits,” a performance featuring legendary artists William Burden and Frederica Von Stade. They will also perform alongside Christabel Nunoo with Keisuke Nakagoshi at the piano. Performance Date: Sept. 19, 2020 A “Because of You” annual benefit gala will be held at the San Francisco {…}