Question: Dexter Scott King, born January 30, 1961, is the brother of what oldest living child of civil rights leaders Martin Luther King Jr. and Coretta Scott King?

Context paragraphs:
Yolanda King: Yolanda Denise King (November 17, 1955 – May 15, 2007) was an American activist and first-born child of civil rights leaders Rev. Martin Luther King, Jr. and Coretta Scott King.  She was known also for her artistic and entertainment endeavors and public speaking.  Her childhood experience was greatly influenced by her father's highly public and influential activism.

Bernice King: Bernice Albertine King (born March 28, 1963) is an American minister best known as the youngest child of civil rights leaders Martin Luther King Jr. and Coretta Scott King.  She was five years old when her father was assassinated.  In her adolescence, King chose to work towards becoming a minister after having a breakdown from watching a documentary about her father.  King was 17 when she was invited to speak at the United Nations.  Twenty years after her father was assassinated, she preached her trial sermon.  Inspired by her parents' activism, she was arrested multiple times during her early adulthood.

Death and funeral of Coretta Scott King: On January 30, 2006, Coretta Scott King, the widow of civil rights leader Martin Luther King, Jr., died after arriving at a rehabilitation center in Rosarito Beach, Mexico.  Her public funeral followed eight days later at the New Birth Missionary Baptist Church in her resident state of Georgia.  In keeping with her personal wishes, King was buried next to her husband in a crypt on the grounds of the King Center for Nonviolent Social Change.

Martin Luther King III: Martin Luther King III (born October 23, 1957) is an American human rights advocate and community activist.  He is the oldest son and oldest living child of civil rights leaders Martin Luther King Jr. and Coretta Scott King.

Martin Luther King Jr. National Historic Site: The Martin Luther King Jr.  National Historic Site consists of several buildings including Martin Luther King Jr.'s boyhood home and the original Ebenezer Baptist Church, the church where King was baptized and both his father Martin Luther King Sr. and he were pastors.  These places, critical to the interpretation of the life of Martin Luther King Jr. and his legacy as a leader of the American Civil Rights Movement, were included in the National Historic Site when it was established on October 10, 1980.

Dexter Scott King: Dexter Scott King (born January 30, 1961) is the second son of civil rights leaders Martin Luther King, Jr. and Coretta Scott King.  His siblings are Martin Luther King III, the Reverend Bernice Albertine King, and the late Yolanda Denise King.

King Center for Nonviolent Social Change: The Martin Luther King Jr.  Center for Nonviolent Social Change is a nongovernmental, not-for-profit organization founded in 1968 by Coretta Scott King.  King started the organization in the basement of the couple's home in the year following the 1968 assassination of her husband, Martin Luther King Jr.

Coretta Scott King: Coretta Scott King (April 27, 1927January 30, 2006) was an American author, activist, civil rights leader, and the wife of Martin Luther King, Jr. from 1953 until his death in 1968.  Coretta Scott King helped lead the Civil Rights Movement in the 1960s.  King was an active advocate for African-American equality.  King met her husband while in college, and their participation escalated until they became central to the movement.  In her early life, Coretta was an accomplished singer, and she often incorporated music into her civil rights work.

Coretta Scott King Award: The Coretta Scott King Award is an annual award presented by the Ethnic & Multicultural Information Exchange Round Table, part of the American Library Association (ALA).  Named for Coretta Scott King, wife of Martin Luther King, Jr., this award recognizes outstanding African American authors and illustrators, and is awarded for books about the African-American experience that are written for a youth audience (high school or elementary).

Coretta: Coretta (foaled February 11, 1994 in Ireland) is a Thoroughbred racemare who competed in the United States.  She was bred and raced by Gerald Leigh, proprietor of England's Eydon Hall Stud.  Leigh owned and bred her dam, Free At Last, who was a daughter of the 1978 Epsom and Irish Derby winner, Shirley Heights.  A philanthropist with a strong social conscience who was a member of the Council of Management for the Animal Health Trust, Gerald Leigh named Free At Last for those words contained in Martin Luther King's August 28, 1963, "I Have a Dream" speech.  Leigh named Free At Last's first foal, Coretta, for Martin Luther King's widow, Coretta Scott King.  Gerald Leigh later gave another of Free At Last's foals the name of the African American civil rights activist, Rosa Parks.

Supporting paragraphs: Dexter Scott King Martin Luther King III
Answer: Martin Luther King III