Question: The lead vocalist fort he band L'Arc-en-Ciel stars with Leehom Wang in a 2003 film screened on May 13 at what festival?
Sentence (from "Moon Child (2003 film)"): It was released on April 19 in Japan, and screened on May 13 at the Cannes Film Festival and on April 12, 2004 at Philadelphia Film Festival.
Relevant evidence: Yes