Complex sentence: Graham made some astute purchases and also helped blood youngsters from Leeds'successful youth cup winning side, and by the end of the 1997--98 season Leeds had qualified for the following season's UEFA Cup.
Split into simpler sentences: Graham made some astute purchases and also helped blood youngsters from Leeds'successful youth cup winning side. By the end of the 1997--98 season Leeds had qualified for the following season's UEFA Cup.