Complex sentence: In 1995, "Dumb and Dumber" (the final Hanna-Barbera series to air on a broadcast network) aired, then came "What a Cartoon!" (known as "World Premiere Toons"), an animation showcase led by Seibert.
Split into simpler sentences: In 1995, "Dumb and Dumber" (the final Hanna-Barbera series to air on a broadcast network) aired. Next came "What a Cartoon!" (known as "World Premiere Toons"), an animation showcase led by Seibert.