Complex sentence: Overall, HC České Budějovice had been relegated to the second-tier league five other times since the 1958-59 season; in each case the club re-earned promotion to the top league the following season.
Split into simpler sentences: Overall, HC České Budějovice has been relegated to the second-tier league five other times since the 1958-59 season. However, in each of those occasions, the club re-earned promotion to the top league the following season.