Complex sentence: Stahl was the moderator of "Face the Nation" between September 1983 and May 1991, and from 2002-2004, Stahl hosted "48 Hours Investigates".
Split into simpler sentences: Stahl was the moderator of "Face the Nation" between September 1983 and May 1991. In addition, from 2002-2004, she hosted "48 Hours Investigates".