Complex sentence: He sat on the U.S. Supreme Court for more than thirty-six years (1939-75), longer than any other Justice, and during those years he wrote some thirty books in addition to his opinions and dissenting opinions.
Split into simpler sentences: He sat on the U.S. Supreme Court for more than thirty-six years (1939-75), longer than any other Justice. During those years, he wrote some thirty books in addition to his opinions and dissenting opinions.