Complex sentence: After law school, from 1989-1990, Roberts clerked for Justice Ruth Bader Ginsburg on the US Court of Appeals for the District of Columbia Circuit and from 1990-1991 for Justice John Paul Stevens on the U.S. Supreme Court.
Split into simpler sentences: After law school, from 1989-1990, Roberts clerked for Justice Ruth Bader Ginsburg on the US Court of Appeals for the District of Columbia Circuit. From 1990-1991, he clerked for Justice John Paul Stevens on the U.S. Supreme Court.