Question:  Kim Sang-bum is best known for his role as So Yi-jung in "Boys Over Flowers", a South Korean television series, which aired in what year?

Context paragraphs:
Sunmin: Sunmin (Hangul: 선민, "Katakana": ソンミン, born August 4, 1987) is a South Korean singer who speaks and sings in Korean, Japanese, and English.  She debuted in 2006, with the single "Keep Holding You," a collaboration with the Japanese R&B singer Toshinobu Kubota.  Her career was initially focused on the Japanese market, but her work became focused in South Korea from 2009 to 2010.  She also contributed to original soundtracks of South Korean television series "Master of Study" and "Gloria (2010 TV series)".  In 2010 to 2011, she was in the main South Korean musical production of "Jekyll & Hyde" as Lucy.  In 2012 to 2013, she reprised her role as Lucy in the South Korean national tour.  In spring 2013, Sunmin played Josephine in the South Korean production of "Arsène Lupin", the musical.

Kim Bum: Kim Sang-bum (; born July 7, 1989), known by the stage name Kim Bum, is a South Korean actor, dancer, singer and model.  He is best known for his role as So Yi-jung in "Boys Over Flowers".

Boys Over Flowers (TV series): Boys Over Flowers () is a 2009 South Korean television series starring Lee Min-ho, Ku Hye-sun, Kim Hyun-joong (of SS501), Kim Bum, Kim Joon (of T-Max) and Kim So-eun.  It aired on KBS2 from January 5 to March 31, 2009 on Mondays and Tuesdays at 22:00 for 25 episodes.

Kim Sang-bum (film editor): Kim Sang-bum (born August 14, 1954) is a South Korean film editor.

Kim Ki-bum: Kim Ki-bum (born August 21, 1987) is a South Korean actor and singer.  He was a member of the South Korean boy band Super Junior.  After the release of Super Junior's third studio album "Sorry, Sorry" in 2009, Kim announced his leave from the group to pursue his acting career.  In 2015, Kim announced he ended his contract with S.M. Entertainment and departure from the group.  Kim made his television debut in the Korean television drama, "April Kiss", in 2004.

Plus Nine Boys: Plus Nine Boys (; lit.  "Boys Whose Ages End in Nine") is a 2014 South Korean television series starring Kim Young-kwang, Yook Sung-jae, Oh Jung-se and Choi Ro-woon.  It aired on tvN from August 29 to October 11, 2014 on Fridays and Saturdays at 20:50 for 14 episodes.

Kim Nam-joo: Kim Nam-joo (born May 10, 1971) is a South Korean actress.  Kim rose to stardom in the 1990s in television series such as "Model", "The Boss" and "Her House".  After 2001, Kim went into semi-retirement, only appearing in commercials, particularly after she got married to actor Kim Seung-woo in 2005 and they started a family.  Then in 2009, she made her comeback with "Queen of Housewives", written by Park Ji-eun.  "Housewives" was a ratings hit, and Kim went on to collaborate with Park on "Queen of Reversals" (2010), and "My Husband Got a Family" (the number one top-rated program on Korean television for the entire year of 2012), and the series' success established Kim's continuing star status.

White Christmas (TV series): 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.

Our Gap-soon: Our Gap-soon () is a 2016–2017 South Korean television series starring Kim So-eun and Song Jae-rim.  This is the first time that a virtual couple from MBC's "We Got Married" co-stars as main cast in a serial drama on a national Korean television network.  It aired on SBS every Saturdays to Sundays at 20:45 (KST) from August 27 to October 30, 2016, and then 2 episodes every Saturdays from November 5, 2016 to April 8, 2017.  This change generated a rating increase that led to an 11-episode extension, making the series end with 61 episodes.

My Lovely Sam Soon: My Lovely Sam-soon (; lit.  My Name Is Kim Sam-soon) is a South Korean television series based on the internet novel of the same title by Ji Soo-hyun, which was published on March 9, 2004.  Touted as the Korean version of "Bridget Jones's Diary", it starred Kim Sun-a (who gained 15 pounds for the role), Hyun Bin, Jung Ryeo-won and Daniel Henney.  The series aired on MBC from June 1 to July 21, 2005 on Wednesdays and Thursdays at 21:55 for 16 episodes.

Supporting paragraphs: Kim Bum Boys Over Flowers (TV series)
Answer: 2009