Complex sentence: It was a spin-off series from Hanna-Barbera's "Harlem Globetrotters"; this show featured the basketball team Harlem Globetrotters as undercover superheroes, who would transform from their regular forms by entering magic portable lockers carried in Globetrotter.
Split into simpler sentences: It was a spin-off series from Hanna-Barbera's "Harlem Globetrotters". This show featured the basketball team Harlem Globetrotters as undercover superheroes, who would transform from their regular forms by entering magic portable lockers carried in Globetrotter.