Original sentence: Ian Holloway became the first manager to win his first league game in charge with a 2-0 victory over Bristol City, since David Halliday in 1955 but also became the first manager to see Leicester relegated to the third flight of English football.There have been 9 managers in the 8 years since the loss of Martin O'Neill
Edited sentence: Ian Holloway became the first manager to win his first league game in charge with a 2–0 victory over Bristol City, since David Halliday in 1955 but also became the first manager to see Leicester relegated to the third flight of English football.There have been nine managers in the eight years since the loss of Martin O'Neill