Complex sentence: The film premiered internationally on September 27,2014 at Raindance Film Festival in the United Kingdom, and premiered in the United States on October 6,2014 at the Mill Valley Film Festival.
Split into simpler sentences: The film premiered internationally on September 27,2014 at Raindance Film Festival in the United Kingdom. And premiered in the United States on October 6,2014 at the Mill Valley Film Festival.