context: In addition to these, the Virginia football team competes in the Souths Oldest Rivalry against North Carolina Tar Heels, an old and historic rivalry game which a sitting President of the United States, Calvin Coolidge, made time to attend in Charlottesville in 1924. UVA currently trails in the long series against both North Carolina and Virginia Tech however, a lasting vestige of the period when Colgate Darden de-emphasized football and turned down a bid to the 1952 Orange Bowl at a time when Arthur Guepe was attaining national top 10 rankings for Virginia football and regularly beating both of its primary rivals by scores such as 34-7 and 44-0. The 1960s and 1970s were thus particularly dark decades for the football program, which later experienced a resurgence in the 1980s and 1990s under George Welsh (American football). Coach Welsh led the program to most of its bowl bids beginning with the very first it was able to accept, the 1984 Peach Bowl. Welsh, who even attained several AP No. 1 rankings for the program throughout October 1990, is now a member of the College Football Hall of Fame after ranking second for most wins in ACC history behind Bobby Bowden of Florida State. In a historic rivalry between two legendary coaches, Welsh finished two games up in the head-to-head series against Virginia Tech coach Frank Beamer, 8&ndash;6. He was also downright dominant against UNC in the Souths Oldest Rivalry, finishing 13-5-1, including a perfect 10&ndash;0 record against North Carolina at Scott Stadium.
question: Who were the 2 rival coaches?
answer: George Welsh