Complex sentence: The Tampa Bay Thrillers were a franchise in the Continental Basketball Association (CBA) from 1984--1987, winning back-to-back championships in 1984--85 and 1985--86.
Split into simpler sentences: The Tampa Bay Thrillers were a franchise in the Continental Basketball Association (CBA) from 1984--1987. They won back-to-back championships in 1984--85 and 1985--86.