Question: Which of these Asian directors was behind the science fiction adventure film "Snowpiercer", Bong Joon-ho or Vincent Kok?

full_context: Document 1: Vicky Wong: Vicky Wong Wai-kit ( ) is a Hong Kong film director. He co-directed the 2016 film "Trivisa" produced by Hong Kong film director Johnnie To and screen writer Yau Nai Hoi. Trivisa has won numerous awards including Best Screenplay, Best Editing, Best Actor, Best Director and Best Picture at the 36th Hong Kong Film Awards, Best film at the Hong Kong Film Critics Society Award. Vicky was also nominated for Best New Director at the 53th Golden Horse Film Festival and Awards.
Document 2: Wkw/tk/1996@7'55&quot;hk.net: wkw/tk/1996@7′55″hk.net is a 1996 commercial short film by Hong Kong director Wong Kar-wai that he made for Japanese fashion designer Takeo Kikuchi. The title contains the initials of Wong Kar-wai and Takeo Kikuchi, the year of release, the length, 7 minutes 55 seconds, and "hk" for Hong Kong.
Document 3: Louis Koo: Louis Koo (Koo Tin-lok 古天樂; born 21 October 1970) is a Hong Kong film actor. He began his professional career as an actor in local television series, winning TVB's Best Actor award in 1999 and 2001. Then he focused on film career. Now Koo is one of the stalwarts of the Hong Kong film industry. Koo has been the ambassador of Hong Kong International Film Festival from 2014 to 2017. Koo founded "One Cool Film Production Limited" in 2013. As of 2017, One Cool Film has produced 14 films.
Document 4: Park Chan-wook: Park Chan-wook ( ] ; born August 23, 1963) is a South Korean film director, screenwriter, producer, and former film critic. One of the most acclaimed and popular filmmakers in his native country, Park is most known for his films "Joint Security Area", "Thirst" and what has become known as "The Vengeance Trilogy", consisting of 2002's "Sympathy for Mr. Vengeance", 2003's "Oldboy" and 2005's "Lady Vengeance". His films are noted for their immaculate framing, black humor and often brutal subject matter.
Document 5: House of Wolves (film): House of Wolves is a 2016 Hong Kong comedy film co-written and directed by Vincent Kok, who also appears in a supporting role in the film, and starring Francis Ng and Ronald Cheng. The film was released on 21 January 2016.
Document 6: Bong Joon-ho: Bong Joon Ho (, ] ; born September 14, 1969) is a South Korean film director and screenwriter. His films include South Korean hits "Memories of Murder" (2003), based on a true-life serial murder case, monster movie "The Host" (2006), and his first English-language film, science fiction adventure "Snowpiercer" (2013). His latest film is "Okja" (2017), a South Korean-American film, which competed for the "Palme d'Or" in the main competition section at the 2017 Cannes Film Festival. "Okja" was subsequently released by Netflix on June 28, 2017.
Document 7: Memories of Murder: Memories of Murder () is a 2003 South Korean crime-drama film co-written and directed by Bong Joon-ho. It is based on the true story of Korea's first serial murders in history, which took place between 1986 and 1991 in Hwaseong, Gyeonggi Province. Song Kang-ho and Kim Sang-kyung star as Detective Park and Detective Seo, respectively, two of the detectives trying to solve the crimes.
Document 8: All's Well, Ends Well 2009: All's Well, Ends Well 2009 () is a 2009 Hong Kong romantic comedy film directed by Vincent Kok. It is the fourth instalment in the "All's Well, Ends Well" film series, the previous film being "All's Well, Ends Well 1997".
Document 9: Vincent Chui: Vincent Tsui (崔允信) is one of the few independent film directors in Hong Kong. He starts his filming career in "As Time Goes By" (1997), a documentary film he co-directed with Ann Hui.
Document 10: Kim Sang-kyung: Kim Sang-kyung (born June 1, 1972) is a South Korean actor. He is best known for his leading roles in "Memories of Murder" (2003) and "May 18" (2007). Two of his films directed by Hong Sang-soo, "Tale of Cinema" (2005) and "Ha Ha Ha" (2010), screened at the Cannes Film Festival. Kim has also starred in numerous television dramas, notably the period epic "King Sejong the Great" (2008) and the family comedy "What's With This Family" (2014).
Document 11: Yeon Sang-ho: Yeon Sang-ho (born 1978) is a South Korean film director and screenwriter. He wrote and directed the animated films "The King of Pigs" (2011) and "The Fake" (2013), and the live-action film "Train to Busan" (2016).
Document 12: Snowpiercer: Snowpiercer (Hangul: 설국열차 ; Hanja: 雪國列車 ; RR: "Seolgungnyeolcha " ) is a 2013 English-language South Korean-Czech science fiction thriller film based on the French graphic novel "Le Transperceneige" by Jacques Lob, Benjamin Legrand and Jean-Marc Rochette. The film is directed by Bong Joon-ho, and written by Bong and Kelly Masterson. The film marks Bong's English-language debut; approximately 80% of the film was shot in English.
Document 13: Vincent Kok: Vincent Kok Tak-Chiu (born 15 August 1966) is a Hong Kong actor, scriptwriter and film director.
Document 14: Okja: Okja is a 2017 action-adventure film directed by Bong Joon-ho and co-written by Bong and Jon Ronson. The film stars an ensemble cast headed by South Korean child actress Ahn Seo-hyun, alongside Hollywood actors Tilda Swinton, Paul Dano, Steven Yeun, Lily Collins, and Jake Gyllenhaal.
Document 15: Shim Sung-bo: Shim Sung-bo (born 1972) is a South Korean film director and screenwriter. Shim became notable when he co-wrote "Memories of Murder" with director Bong Joon-ho in 2003. Besides winning numerous awards and being widely considered as one of the greatest Korean films of all time, "Memories of Murder" was praised for its twisting genre conventions that made it a big hit in Korea (with over 5.1 million admissions, making it the most watched film during the year 2003 in South Korea) as well as a successful piece of social cinema that engaged with Korea's troubled history.
ground_truth: Bong