Complex sentence: At the 46th Japan Science Fiction Convention, "Dennō Coil" was the only winner of the Seiun Award in the media category which covers all non-literary works, such as movies and TV series.
Split into simpler sentences: At the 46th Japan Science Fiction Convention, "Dennō Coil" was the only winner of the Seiun Award in the Media category. The Media category covers all non-literary works, such as movies and TV series.