Complex sentence: The "Laurel" class sailing Sixth rates were a series of six post ships built to an 1805 design by Sir John Henslow, which served in the Royal Navy during the Napoleonic War.
Split into simpler sentences: The "Laurel" class sailing Sixth rates were a series of six Post ships built to an 1805 design by Sir John Henslow. The vessels of the class served in the Royal Navy during the Napoleonic War.