Complex sentence: Bennet was due to become the Times's Beijing correspondent in late 2006, but he resigned from the paper in March of that year to accept an offer to become the 14th editor-in-chief of "The Atlantic".
Split into simpler sentences: Bennet was due to become the Times's Beijing correspondent in late 2006. He resigned from the paper in March of that year to accept an offer to become the 14th editor-in-chief of "The Atlantic".