Question: Ballad of Seodong is a South Korean television series starring Jo Hyun-jae, Ryu Jin and Lee Bo-young, a South Korean actress, born when?

Context paragraphs:
Lee Bo-young: Lee Bo-young (; born January 12, 1979) is a South Korean actress.  She is best known for starring in the television dramas "My Daughter Seo-young" (2012), "I Can Hear Your Voice" (2013) and "Whisper" (2017).

Ballad of Seodong: Ballad of Seodong () is a South Korean television series starring Jo Hyun-jae, Lee Bo-young and Ryu Jin.  It aired on SBS from September 5, 2005 to March 21, 2006 on Mondays and Tuesdays at 21:55 for 55 episodes.

Sunlight Pours Down: Sunlight Pours Down () is a 2004 South Korean television series starring Song Hye-kyo, Jo Hyun-jae, and Ryoo Seung-bum.  It aired on SBS from February 11 to April 1, 2004 on Wednesdays and Thursdays at 21:55 for 16 episodes.  It received an average viewership rating of 11.9%, and a peak rating of 14.4%.

Ad Genius Lee Tae-baek: Ad Genius Lee Tae-baek () is a 2013 South Korean television series starring Jin Goo, Park Ha-sun, Jo Hyun-jae and Han Chae-young.  Set in the cutthroat field of advertising where creativity and competition coexist, the drama is the success story of underdog Lee Tae-baek who fights his way to becoming the best ad man in the business.  It aired on KBS2 from February 4 to March 26, 2013 on Mondays and Tuesdays at 21:55 for 16 episodes.

Love Truly: Love Truly (; lit.  I Really, Really Like You) is a 2006 South Korean television series starring Eugene, Lee Min-ki and Ryu Jin.  It aired on MBC from April 8 to August 6, 2006 on Saturdays and Sundays at 19:55 for 34 episodes.

Forbidden Love (2004 TV series): Forbidden Love (; lit.  Tale of the Nine-Tailed Fox) is a 2004 South Korean television series starring Kim Tae-hee, Jo Hyun-jae and Jun Jin.  It aired on KBS2 from July 19 to September 7, 2004 on Mondays and Tuesdays at 21:50 for 16 episodes.

Love Letter (TV series): Love Letter () is a 2003 South Korean television series starring Jo Hyun-jae, Soo Ae and Ji Jin-hee.  It aired on MBC from February 10 to April 1, 2003 on Mondays and Tuesdays at 21:55 for 16 episodes.

49 Days: 49 Days () is a 2011 South Korean television television series starring Lee Yo-won, Nam Gyu-ri, Jo Hyun-jae, Bae Soo-bin, Jung Il-woo and Seo Ji-hye.  It aired on SBS from March 16 to May 19, 2011 on Wednesdays and Thursdays at 21:55 for 20 episodes.

One Mom and Three Dads: One Mom and Three Dads () is a 2008 South Korean television series starring Eugene, Jo Hyun-jae, Jae Hee, and Shin Sung-rok.  It aired on KBS2 from April 4 to May 22, 2008 on Mondays and Tuesdays at 21:55 for 16 episodes.

Jo Hyun-jae: Jo Hyun-jae (born May 9, 1980) is a South Korean actor.  Jo made his entertainment debut as a singer in the four-member boy band Guardian, which disbanded after releasing their self-titled album in 1998.  In 2000, after he drew popularity when he appeared in a commercial for sports drink Pocari Sweat, Jo began acting.  He is best known for his leading roles in "Love Letter" (2003), "Only You" (2005), "Ballad of Seodong" (2005), and "49 Days" (2011).

Supporting paragraphs: Ballad of Seodong Lee Bo-young
Answer: January 12, 1979