Complex sentence: After much speculation, the film made its international debut at the 2016 Cannes Film Festival, where it was in competition for the Palme d'Or, Almodóvar's fifth film to be selected for the competition.
Split into simpler sentences: After much speculation, it was announced that the film will make its international debut at the 2016 Cannes Film Festival, where it will compete for the Palme d'Or. It will be Almodóvar's fifth film to be selected for the competition.