Complex sentence: He guided Scotland to qualification for the 1990 World Cup and the 1992 European Football Championship, and left in 1993 after failing to achieve qualification for the 1994 World Cup.
Split into simpler sentences: He guided Scotland to qualification for the 1990 FIFA World Cup and the 1992 European Football Championship. Roxburgh resigned in 1993 after failing to achieve qualification for the 1994 FIFA World Cup.