Question: Kim Ye-won (born December 5, 1989), also known mononymously as Yewon, is a South Korean actress, singer and entertainer, Kim joined the fourth season of the reality show, "We Got Married", a reality variety show and was a segment of which program?

Context paragraphs:
Volume Up (radio show): Volume Up () is a South Korean radio show currently hosted by Kim Ye-won on KBS 2FM in Seoul and UKBS MUSIC DMB in the provinces, airing everyday at 20:00–22:00 (KST), just right after KBS 2FM News 8PM edition.  Known as the "ruler of the dinner time" the show became the highest-rated radio program in its time slot across both AM and FM bandwidths in Seoul.  KBS 2FM was South Korea's No. 10 station.  Popular for soft music playlist, a short soap opera segment called "Lie to Me" based on the 2011 TV drama of the same title and Yoo's "My Final Message".

Kim Jong-wook: Kim Jong-Wook (Korean: 김종욱 , born February 1, 1982) is a South Korean singer.  He is best known for "Only You", the theme song of the popular Korean reality show "We Got Married".  Before leaving for the army, Kim Jong-wook released a song “Goodbye for Now” ("Army Entrance Day"), which was released on December 4, 2009.  He has a bachelor's degree in industrial engineering from Konkuk University and graduated from the Kyung Hee University Graduate School of Communication.

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.

We Got Married: We Got Married () was a South Korean reality variety show.  It used to be one segment of the "Sunday Sunday Night" program.  It aired on Saturday 17:00 KST on MBC.  First broadcast in 2008, the show pairs up Korean celebrities to show what life would be like if they were married, however, some couples are real-life couples that eventually got married.  Each week, couples have assigned missions to complete, with candid interviews of the participants to reveal their thoughts and feelings.

We Got Married (Season 4): "We Got Married" (Season 4) is the fourth season of South Korean MBC's "We Got Married" (), a reality variety show and was a segment of the "Sunday Sunday Night" program.  First broadcast in 2008, the show pairs up Korean celebrities to show what life would be like if they were married.  Each week, couples are assigned missions to complete, while interviews with the participants reveal their thoughts and feelings.

Gain (singer): Son Ga-in (born September 20, 1987), better known mononymously as Gain, is a South Korean singer, actress and entertainer.  She is best known as a member of the South Korean girl group Brown Eyed Girls and for her appearances alongside Jo Kwon from 2AM for TV shows "We Got Married" and "All My Love".  As a solo artist she has released six EPs.

We Got Married (Season 1): "We Got Married" (Season 1) is the first season of "We Got Married" (우리 결혼했어요), a popular reality South Korean variety show and a segment of the "Sunday Sunday Night" program.  First broadcast in 2008, the show pairs up Korean celebrities to show what life would be like if they were married.  Each week, couples are assigned missions to complete, with candid interviews of the participants to reveal their thoughts and feelings.

We Got Married (Season 2): "We Got Married" (Season 2) is the second season of "We Got Married" (우리 결혼했어요), a popular reality South Korean variety show and a segment of the "Sunday Sunday Night" program.  First broadcast in 2008, the show pairs up Korean celebrities to show what life would be like if they were married.  Each week, couples are assigned missions to complete, with candid interviews of the participants to reveal their thoughts and feelings.

Kim Ye-won (actress, born 1987): Kim Ye-won (born Kim Shin-ah on December 11, 1987) is a South Korean actress and singer.

Kim Ye-won (singer): Kim Ye-won (born December 5, 1989), also known mononymously as Yewon, is a South Korean actress, singer and entertainer.  She was debuted in 2011 as a member of K-pop girl group Jewelry.  Alongside her singing career, she appeared on television in dramas, sitcoms and variety shows.  After Jewelry disbanded in early 2015, Kim joined the fourth season of reality show "We Got Married", where she was paired with singer Henry Lau. It was confirmed that her contract with Star Empire Entertainment would be expired in the end of October 2016.  She later signed Jellyfish Entertainment in November 2016.

Supporting paragraphs: Kim Ye-won (singer) We Got Married (Season 4)
Answer: Sunday Sunday Night