Question: What 2015 South Korean film did Bae Seong-woo star in that premiered at the 2015 Cannes Film Festival?
Sentence (from "Office (2015 South Korean film)"): Office (오피스 ) is 2015 South Korean slasher-thriller film directed by Hong Won-chan and starring Go Ah-sung and Park Sung-woong.
Relevant evidence: Yes