question: Kim Eui-sung is a south korean actor who starred in the film Office directed by who?
answer: film directed by Hong Won-chan
context: Title: Kim Eui-sung
  Passage: Kim Eui-sung (; born December 17, 1965) is a South Korean actor.  He starred in film such as "Office" (2015), "" (2015), "Train to Busan" (2016) and "The Truth Beneath".  He also appears in the TV series "W" (2016).
  Title: Kim Dong-wook
  Passage: Kim Dong-wook (born July 29, 1983) is a South Korean actor.  After appearing in student short films and several minor parts, Kim became a star through his supporting role in the popular TV series "Coffee Prince" (2007), followed by box office hit "Take Off" (2009).  He then starred in "Happy Killers" (2010) and "Romantic Heaven" (2011), but it was his acclaimed performance as an obsessed and tormented king in 2012 period drama "The Concubine" that brought Kim the best reviews of his career yet.
  Title: Office (2015 South Korean film)
  Passage: Office (오피스 ) is 2015 South Korean slasher-thriller film directed by Hong Won-chan and starring Go Ah-sung and Park Sung-woong.  It is about a detective trying to figure out why a mild-mannered man has killed his family and is targeting his co-workers.  The film premiered at the Midnight Screenings section of the 2015 Cannes Film Festival.
citations: Office (2015 South Korean film) Kim Eui-sung