Question: The 2015 film starring an actor whose debut was in the television series White Christmas was directed by whom?
Context: Twenty () is a 2015 South Korean coming-of-age film starring Kim Woo-bin, Lee Junho and Kang Ha-neul.  It was written and directed by Lee Byeong-heon, his second feature after the 2012 indie "Cheer Up, Mr. Lee". A Snow White Christmas is a Christmas animated television special produced by Filmation and telecast December 19, 1980, on CBS.  It is a sequel to the fairy tale "Snow White", unrelated to Filmation's other sequel to "Snow White" titled "Happily Ever After" (1990).  While this is a sequel to the original story and not the 1937 Disney film, there are some similarities.  The film's plot revolves around the return of the Wicked Queen, who is unexpectedly brought back to life and casts an evil spell that freezes the entire land.  It is up to young Snow White, the daughter of the original Snow White aided by the seven giants, to defeat her once-and-for-all and save the kingdom. Jon Opstad is a British composer.  He studied music at St Catharine's College, Cambridge, and film composition at the National Film and Television School.  His film and television work includes scoring two episodes of Charlie Brooker's critically acclaimed dystopian television drama "Black Mirror", including the 2014 feature-length special White Christmas, starring Jon Hamm, Rafe Spall and Oona Chaplin.  Other scores include the Channel 4 dramas "Cyber Bully and Blackout", the "Pals" episode of BBC Three drama "Our World War" and the award-winning documentary feature fil"m A World Not Ours", directed by Mahdi Fleifel.  He was the co-composer (with Sheridan Tongue) on several episodes of series 16 of BBC One crime drama "Silent Witness". "White Christmas" is a 2014 Christmas special episode of the British science fiction anthology series "Black Mirror".  It was written by series creator and showrunner Charlie Brooker and directed by Carl Tibbetts, and first aired on Channel 4 on 16 December 2014.  The only television special of the series, it is also the last episode to be aired on Channel 4, as the series would move to Netflix for its third series. Kim Woo-bin (born Kim Hyun-joong on July 16, 1989) is a South Korean model and actor.  He began his career as a runway model and made his acting debut in the television drama "White Christmas".  He subsequently gained attention in "A Gentleman's Dignity" (2012), and made his breakthrough with "School 2013" (2012-2013) and "The Heirs" (2013).  Kim later starred in box office hits "" (2013), "The Con Artists" (2014) and "Twenty" (2015).  In 2016, he took on his first leading role on television in "Uncontrollably Fond". "White Christmas Blues" is the eighth episode of the 25th season of the American animated sitcom "The Simpsons", and the 538th episode of the series.  It originally aired on the Fox network in the United States on December 15, 2013.  The episode was written by Don Payne and directed by Steven Dean Moore.  It was the first Christmas episode since "Holidays of Future Passed" and the twelfth Christmas episode of the show. White Christmas () is a 2011 South Korean television series starring Kim Sang-kyung, Baek Sung-hyun, and a cast of then-rookie actors, namely Kim Young-kwang, Lee Soo-hyuk, Kwak Jung-wook, Hong Jong-hyun, Esom, Kim Woo-bin, Sung Joon, Jung Suk-won, and Lee El.  Written by Park Yeon-seon and directed by Kim Yong-soo, it aired as part of the Drama Special anthology series on KBS2 from January 30 to March 20, 2011 on Sundays at 23:15 for 8 episodes. Sweet Stranger and Me () is a South Korean television series based on the 2015 webtoon of the same name by Yoo Hyun-sook.  It was aired every Mondays and Tuesdays at 22:00 (KST) on KBS2.  This drama reunited Kim Young-kwang and Lee Soo-hyuk in KBS 2011 Drama Special "White Christmas", White Christmas is a 1954 American musical romantic comedy film directed by Michael Curtiz and starring Bing Crosby, Danny Kaye, Rosemary Clooney, and Vera-Ellen.  Filmed in VistaVision and Technicolor, it features the songs of Irving Berlin, including a new version of the title song, "White Christmas", introduced by Crosby in the film "Holiday Inn". Tony Yazbeck is an American actor, singer, and dancer, best known for his work on the Broadway stage including the 2014 revival of "On the Town" for which he received 2015 Tony Award and Outer Critics Circle Award nominations for lead actor in a musical.  Yazbeck is also known for his principal roles on Broadway including J.M. Barrie in the Broadway production of "Finding Neverland", Tulsa in "Gypsy" starring Patti LuPone, Billy Flynn in "Chicago", Phil Davis in "White Christmas", Al Deluca in "A Chorus Line" and the original casts of Broadway's "Never Gonna Dance" and "Oklahoma" (2002 revival).
Answer: Lee Byeong-heon