Question: What year did the man, who was impersonated by Roger Kitter in the Lego advertisement, die of a heart attack?

Related documents: [0]  [DOC] Thomas Frederick "Tommy" Cooper (19 March 1921 – 15 April 1984) was a British prop comedian and magician. Cooper was a member of the Magic Circle, and respected by traditional magicians. He was famed for his red tarboosh, and his appearance was large and lumbering, at 6 ft and more than 15 st in weight. On 15 April 1984, Cooper collapsed with a heart attack on live national television, and died soon afterwards. [END] 
[1]  [DOC] Roger Kitter (20 October 1949 – 3 January 2015) was an English actor best known for playing Captain Alberto Bertorelli in series 7 of the British sitcom TV series "'Allo 'Allo!". He had previously appeared weekly with Lulu throughout the 10-week run of her 1973 BBC1 series "It's Lulu". With Kaplan Kaye he also recorded a song "Chalk Dust – the Umpire Strikes Back" using the moniker 'The Brat'. Released on the Hansa label, it entered the UK Singles Chart on 10 July 1982; it reached a peak of number 19, and remained in the chart for 8 weeks. The song was a Top 10 hit in the Netherlands, Belgium and South Africa, and lampooned John McEnroe complaining about line calls in tennis ("The ball's in, everyone can see that the ball's in!"). He was also an impressionist, who provided the voice of Tommy Cooper in the Lego 'Kipper' advertisement. [END]  
Answer: 1984
1984