Complex sentence: In 1980 Creighton appeared masked on Dutch televison to reveal the truth about the disappearing of the submarine, which he had deliberately sunk on order of Churchillt and with knowledge of Roosevelt and Queen Wilhelmina of The Netherlands.
Split into simpler sentences: In 1980 Creighton appeared masked on Dutch televison to reveal the truth about the disappearing of the submarine. He told that he had deliberately sunk the submarine on order of Churchill and with knowledge of Roosevelt and Queen Wilhelmina of The Netherlands.