Complex sentence: He has always raced with the number No.46 in his motorcycle grand prix career, the number his father had raced with in the first of his 3 grand prix career wins in 1979, in Yugoslavia, on a 250c Morbidelli.
Split into simpler sentences: He has always raced with the number No.46 in his motorcycle grand prix career. The number his father had raced with in the first of his 3 grand prix career wins, in 1979, in Yugoslavia, on a 250c Morbidelli.