Original: The deaths in 1978 of both Ronnie Peterson and Gunnar Nilsson contributed to the demise of this round of the world championship, as interest for Formula One in Sweden fell following the death of the two Swedish racers.
Simplified: The deaths in 1978 of both Ronnie Peterson and Gunnar Nilsson contributed to dropping the Swedis GP from the world championship. Interest for Formula One in Sweden fell following the death of these two Swedish racers.