Question: Shin Eun-kyung is best known for her leading role in a South Korean film about a female gang boss who needs to get married to fulfill what?

Context paragraphs:
The Last Match: The Last Match () is a 1994 South Korean television series starring Son Ji-chang, Lee Sang-ah, Jang Dong-gun, Shim Eun-ha, Lee Jong-won and Shin Eun-kyung.  It aired on MBC on Mondays and Tuesdays at 21:50 for 16 episodes beginning January 3, 1994.

Mom's Dead Upset: Mom's Dead Upset (; also known as "Angry Mom" and "Mom Has Grown Horns") is a 2008 South Korean television series starring Kim Hye-ja, Lee Soon-jae, Baek Il-seob, Shin Eun-kyung, and Ryu Jin.  It aired on KBS2 from February 2 to September 28, 2008 on Saturdays and Sundays at 19:55 for 66 episodes.  The drama attracted record-breaking ratings, peaking at 42.7% on the September 21 episode.

Scandal: A Shocking and Wrongful Incident: Scandal: A Shocking and Wrongful Incident () is a 2013 South Korean television series starring Kim Jaewon, Jo Yoon-hee, Cho Jae-hyun, Park Sang-min, Shin Eun-kyung, Ki Tae-young, Kim Hye-ri, and Kim Gyu-ri.  It aired on MBC from June 29 to October 27, 2013 on Saturdays and Sundays at 21:45 for 36 episodes.

Shin Eun-kyung: Shin Eun-kyung (born 15 February 1973) is a South Korean actress.  She is best known for her leading roles in "Downfall" (1997) and "My Wife Is a Gangster" (2001).

Kuro Arirang: Kuro Arirang () is a 1989 South Korean film by Park Jong-won which stars Ok So-ri and Lee Geung-young and marks the debut of Choi Min-sik and Shin Eun-kyung.  The film caused a stir over labor issues.

Still You: Still You () is a 2012 South Korean television series starring Shin Eun-kyung, Kim Seung-soo, Wang Bit-na and Song Jae-hee.  It aired on SBS from May 21 to December 3, 2012 on Mondays to Fridays at 19:30 for 124 episodes.

Family Secrets (2014 TV series): Family Secrets () is a 2014 South Korean television series starring Shin Eun-kyung,

Diary of June: Diary of June (; also known as Bystanders) is a 2005 South Korean mystery-crime film starring Shin Eun-kyung, Yunjin Kim and Eric Mun.  The film was released to South Korean cinemas December 1st, 2005 where it received a total of 697,980 admissions nationwide.

White Lies (TV series): White Lies () is a South Korean television series starring Shin Eun-kyung, Kim Hae-sook, Kim Yu-seok, Kim Tae-hyun and Im Ji-eun.  The morning daily drama aired on MBC on Mondays to Fridays at 7:50 a.m. from December 1, 2008 to July 10, 2009 for 159 episodes.

My Wife Is a Gangster: My Wife Is a Gangster () is a 2001 South Korean film directed by Jo Jin-kyu; it's about a female gang boss who needs to get married to fulfill her dying sister's wishes.  A sequel, "My Wife Is a Gangster 2", was released in 2003, with a third ("My Wife Is a Gangster 3") released at the end of 2006.

Supporting paragraphs: Shin Eun-kyung My Wife Is a Gangster
Answer: her dying sister's wishes