Complex sentence: The first CPH PIX Film Festival was held in April 2009 and it had an audience of 36,500 people, which was was the largest audience ever recorded for a film festival in Copenhagen.
Split into simpler sentences: The first CPH PIX Film Festival was in April 2009 and the festival had a record breaking audience of 36.500 people. This was the largest audience ever recorded for a film festival in Copenhagen.