Complex sentence: In the 1980s he had his own studio, De Laurentiis Entertainment Group (DEG), based in Wilmington, North Carolina; the building of the studio quickly made Wilmington a busy center of film and television production.
Split into simpler sentences: In the 1980s he had his own studio, De Laurentiis Entertainment Group (DEG), based in Wilmington, North Carolina. The building of the studio made Wilmington a center of film and television production.