Complex sentence: Jonathan Brent (born 1949) is an American academic, author, publisher, and the director of the "Annals of Communism" series--which he founded in 1992.
Split into simpler sentences: Jonathan Brent (born 1949) is an American academic, author, and publisher. As a publisher, he is the director of the "Annals of Communism" series, which he founded in 1992.