Complex sentence: For a time he also worked under the tutelage of John Crown at the Harrisonburg Daily News-Record until that gentleman's death in 1939 when Byrd took over that newspaper and the rest of his father's chain of newspapers in the Shenandoah Valley.
Split into simpler sentences: For a time he also worked under the tutelage of John Crown at the Harrisonburg Daily News-Record until that gentleman's death in 1939 when Byrd took over that newspaper. In 1939, he assumed control of his father's chain of newspapers in the Shenandoah Valley.