Complex sentence: Public broadcasters in France supplement their licence fee income with revenue from advertising, but changes in the law in 2009 designed to stop public television chasing ratings, have stopped public broadcasters from airing advertising after 8pm.
Split into simpler sentences: Public broadcasters in France supplement their licence fee income with that from advertising. However, changes in the law in 2009 designed to stop public television chasing ratings, have stopped public broadcasters from airing advertising after 8pm.