Complex sentence: He formerly held the Guinness World Record for the most 3x3x3 cubes solved in 24 hours, 5800, set from 3--4 October 2013 at Wilfrid Laurier University, Canada.
Split into simpler sentences: He formerly held the world record for the highest number of cubes solved in 24 hours, at 5800. Set from 3--4 October 2013 at Wilfrid Laurier University, Canada.