Complex sentence: On September 7,2016, Ben Bocquelet announced on twitter that the sixth season would be his last working with the show, and reiterated that the last episode of the season would be the series finale.
Split into simpler sentences: On September 7,2016, Ben Bocquelet announced on twitter that the sixth season would be his last working with the show. Later that day, he clarified the last episode of the season would be the series finale.