Complex sentence: Billboard's rules in 1994 allowed double-sided singles to chart together as one entry; thus, the entry titled "Without You/Never Forget You" had a combined total of 23 weeks on the Hot 100 Singles chart.
Split into simpler sentences: Billboard's rules in 1994 allowed double-sided singles to chart together as one entry. Thus, "Without You/Never Forget You" had a combined total of 23 weeks on the Hot 100 Singles chart.