Complex sentence: The documentary premiered at the 2010 Sundance Film Festival, receiving the Grand Jury Award for Directing in the U.S. Documentary category, and was also well received at the 54th BFI London Film Festival prior to airing on the BBC throughout the United Kingdom and Europe.
Split into simpler sentences: The documentary premiered at the 2010 Sundance Film Festival, receiving the Grand Jury Award for Directing in the U.S. Documentary category. The film was also well received at the 54th BFI London Film Festival prior to airing on the BBC throughout the United Kingdom and Europe.