Question: Who directed the film that opened the 2017 Cannes Film Festival?
Sentence (from "Ismael's Ghosts"): Ismael's Ghosts (French: Les Fantômes d'Ismaël ) is a 2017 French drama film directed by Arnaud Desplechin, starring Mathieu Amalric, Marion Cotillard, Charlotte Gainsbourg and Louis Garrel.
Relevant evidence: Yes