Complex sentence: Shortly before 8:00 am, they were hooded, led up to execution chamber, which could hold as many as eleven witnesses, stood over the trap door, had a noose put around their neck, and hung by falling through the opening trap door.
Split into simpler sentences: Shortly before 8:00 am, they were hooded, and led up to execution chamber, which could hold as many as eleven witnesses. They were made to stand over the trap door, had a noose put around their neck, and hung by falling through the opening trap door.