Complex sentence: In December 2007 he directed the filming of Dame Shirley Bassey's 70th birthday party at Cliveden, the former home of Viscount Astor, which is the house where the Profumo affair occurred and is now an exclusive hotel.
Split into simpler sentences: In December 2007 he directed the filming of Dame Shirley Bassey's 70th birthday party at Clivedon. The former home of Viscount Astor, house where the Profumo affair occurred and now an exclusive hotel.