Complex sentence: The hall is a square block built around a small courtyard constructed from hard sandstone brought by canal from the quarries at Parbold and dressed on the spot by steam-driven saws specially made for the job.
Split into simpler sentences: The hall is a square block built around a small courtyard. It was constructed from hard sandstone brought by canal from the quarries at Parbold and dressed on the spot by steam-driven saws specially made for the job.