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?
Sentence (from "Frontier of the Dawn"): It premiered at the 2008 Cannes Film Festival in competition.
Relevant evidence: No