Complex sentence: They hear on the KQRS radio station that the D.J. (Martin Mull) is running a Turbo-Man competition when they get to the studio they find out they can only win a gift certificate.
Split into simpler sentences: They hear on the KQRS radio station that the D.J. (Martin Mull) is running a Turbo-Man competition. But hen they get to the studio they find out they can only win a gift certificate.