Complex sentence: Tim and Bill watch "Part 97" of their favourite show "The Mysterious World Of Arthur C. Clarke", however, a voiceover informs them that the show has been cancelled due to the non-existence of Arthur C. Clarke.
Split into simpler sentences: Tim and Bill watch "Part 97" of their favourite show "The Mysterious World Of Arthur C. Clarke". However, a voiceover then informs them that the show has been cancelled due to the non-existence of Arthur C. Clarke.