Complex sentence: Whiteford was best known as a competitor in the Australian Grand Prix where he won the race three times in four years most fondly remember for his Talbot-Lago T26 Formula One car which he used to win his second and third Grands Prix.
Split into simpler sentences: Whiteford was best known as a competitor in the Australian Grand Prix which he won three times in four years. He was fondly remember for his Talbot-Lago T26 Formula One car which he used to win his second and third Grands Prix.