Barack Obamaさんのツイートについて
“In her extraordinary career, Cicely Tyson was one of the rare award-winning actors whose work on the screen was surpassed only by what she was able to accomplish off of it. She had a heart unlike any other—and for 96 years, she left a mark on the world that few will ever match.”
Barack Obamaさんの2021/1/29日のツイートからの引用です（https://twitter.com/BarackObama/status/1355003969911857153?s=20）。「accomplish off of it」について、offとofはどのような意味を持っていますか？またitは何を指していますか？
