Complex sentence: Shortly afterward, Myler moved to the United States and was appointed executive editor of the "New York Post", but he returned to London in 2007 to become editor of the "News of the World" until it ceased publication on 10 July 2011.
Split into simpler sentences: Shortly afterward, Myler moved to the United States and was appointed executive editor of the "New York Post". He returned to London in 2007 to become editor of the "News of the World" and remained in post until the paper ceased publication on 10 July 2011.