In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.
Q: The 1968 British Grand Prix was a Formula One motor race held at the Brands Hatch Circuit on 20 July 1968. It was race 7 of 12 in both the 1968 World Championship of Drivers and the 1968 International Cup for Formula One Manufacturers. The 80-lap race was won by Jo Siffert, his first Formula One victory, and the first victory by a Swiss driver. Question: What is the birth date of the person who won his first Formula One victory at the 1968 British Grand Prix? Answer: 7 July 1936
A:
The 80lap race was won by Jo Siffert, his first Formula One victory, and the first victory by a Swiss driver.