Question: The 70th Cannes Film Festival took place from 17 to 28 May 2017, in Cannes, France featured what opening film, a 2017 French drama film directed by Arnaud Desplechin and starred Mathieu Amalric, Marion Cotillard, Charlotte Gainsbourg and Louis Garrel?
{'answer': "Ismael's Ghosts", 'supporting_facts': [['2017 Cannes Film Festival', 0], ['2017 Cannes Film Festival', 2], ["Ismael's Ghosts", 0]]}