Complex sentence: He has appeared in an episode of the BBC science programme "Horizon" in which Professor Marcus du Sautoy attempted to introduce him to elements of mathematical thought which was broadcast on BBC Two on 31 March 2009.
Split into simpler sentences: He has appeared in an episode of the BBC science programme "Horizon" in which Professor Marcus du Sautoy attempted to introduce him to elements of mathematical thought. The episode was broadcast on BBC Two on 31 March 2009.