Complex sentence: The 2004--05 Charlotte Bobcats season was Charlotte's first season in the National Basketball Association (NBA), which marked the return of NBA basketball to Charlotte after a two-year hiatus, the 15th season of the NBA in the city of Charlotte.
Split into simpler sentences: The 2004--05 Charlotte Bobcats season was Charlotte's first season in the National Basketball Association (NBA). This season marked the return of NBA basketball to Charlotte after a two-year hiatus, the 15th season of the NBA in the city of Charlotte.