Complex sentence: As by June through December 2014, most PBS stations had stopped airing WordGirl for unknown reasons including WNET/Thirteen and KCTS9, the show airs new episodes only on the PBS Kids website.
Split into simpler sentences: As by June through December 2014, most PBS stations had stopped airing WordGirl for unknown reasons, including WNET/Thirteen and KCTS9. The show airs new episodes only on the PBS Kids website.