Question: The first African-American woman to be elected a diocesan bishop succeeded a woman who annouced her retirement during what convention?

Context paragraphs:
May Edward Chinn: May Edward Chinn (April 15, 1896 - December 1, 1980) was an African-American woman physician.  She was the first African-American woman to graduate from Bellevue Hospital Medical College and the first African-American woman to intern at Harlem Hospital.  In her private practice, she provided care for patients who would not otherwise receive treatment.  She was a strong advocate of early cancer screening.

Coadjutor bishop: A coadjutor bishop (or bishop coadjutor) is a bishop in the Catholic, Anglican, and (historically) Eastern Orthodox churches whose main role is to assist the diocesan bishop in the administration of the diocese.  The coadjutor (literally, "co-assister" in Latin) is a bishop himself, although he is also appointed as vicar general.  The coadjutor bishop is, however, given authority beyond that ordinarily given to the vicar general, making him co-head of the diocese in all but ceremonial precedence.  In modern times, the coadjutor automatically succeeds the diocesan bishop upon the latter's retirement, removal, or death.

Barbara Jordan: Barbara Charline Jordan (February 21, 1936 – January 17, 1996) was an American lawyer, educator and politician who was a leader of the Civil Rights Movement.  A Democrat, she was the first African American elected to the Texas Senate after Reconstruction, the first Southern African-American woman elected to the United States House of Representatives.  She was best known for her eloquent opening statement at the House Judiciary Committee hearings during the impeachment process against Richard Nixon, and as the first African-American woman to deliver a keynote address at a Democratic National Convention.  She received the Presidential Medal of Freedom, among numerous other honors.  She was a member of the Peabody Awards Board of Jurors from 1978 to 1980.  She was the first African-American woman to be buried in the Texas State Cemetery.

Jennifer Baskerville-Burrows: Jennifer Lynn Baskerville-Burrows is an American Anglican bishop in the Episcopal Church.  In October 2016, she was elected bishop of the Episcopal Diocese of Indianapolis, and she was consecrated on April 29, 2017.  She is the first African-American woman to be elected a diocesan bishop.  Prior to her consecration, she served as Director of Networking in the Diocese of Chicago.  Previously, she was a priest in the Episcopal Diocese of Central New York, the Episcopal Diocese of Newark, and the Episcopal Diocese of California.  In addition to her parish ministry, she has been Director of Alumni and Church Relations at Church Divinity School of the Pacific and a chaplain to Syracuse University.

Bishop of Dover: The Bishop of Dover is an episcopal title used by a suffragan bishop of the Church of England Diocese of Canterbury, England, The title takes its name after the town of Dover in Kent.  The Bishop of Dover holds the additional title of "Bishop in Canterbury" and is empowered to act almost as if he were the diocesan bishop of Canterbury, since the actual diocesan bishop (the Archbishop of Canterbury) is based at Lambeth Palace in London, and thus is frequently away from his diocese, fulfilling national and international duties.  Among other things, this gives the Bishop of Dover an "ex officio" seat in the Church's General Synod.  Until recently, there was another proper suffragan, the Bishop of Maidstone, who did not have the same extra powers.

Episcopal Diocese of Indianapolis: The Episcopal Diocese of Indianapolis, formerly known as the Episcopal Diocese of Indiana, is a diocese in Province V (for the Midwest region) of the Episcopal Church.  It encompasses the southern two-thirds of the state of Indiana.  Its see is in Indianapolis, Indiana, at Christ Church Cathedral.  According to the diocesan newsletter, the diocese has 10,137 communicants in 49 parishes.  The current bishop is Jennifer Baskerville-Burrows, the first African-American woman to serve as diocesan bishop in the Episcopal Church and the first woman to succeed another woman as a diocesan bishop in the Episcopal Church; Catherine Waynick served as bishop of the diocese from 1997 to 2017.

John Michael D'Arcy: John Michael D'Arcy (August 18, 1932 – February 3, 2013) was an American prelate of the Roman Catholic Church.  He was the eighth diocesan bishop of the Diocese of Fort Wayne-South Bend, Indiana.  He was succeeded as diocesan bishop by Bishop Kevin C. Rhoades, who was named to the post by Pope Benedict XVI on Saturday, November 14, 2009.  Until then, Bishop Rhoades had been bishop of Harrisburg, Pennsylvania.

Rachel E. Pruden-Herndon: Rachel E. Pruden-Herndon (1898–1979) became the first African-American woman attorney to be admitted to the Georgia Bar on December 27, 1942.  She became the first African-American woman to be a City Court Judge in 1965.  She was also the first African-American woman from Georgia admitted to practice before the Supreme Court.

Catherine Waynick: Catherine Elizabeth Maples "Cate" Waynick (born November 13, 1948) is an American Anglican bishop.  She was the tenth bishop of the Episcopal Diocese of Indianapolis from 1997 to 2017.  She was elected Bishop Coadjutor of the Episcopal Diocese of Indianapolis in January 1997, was consecrated on June 7 of that year, and became the Diocesan Bishop on September 10, 1997.  She succeeded Edward Witker Jones, who served from 1978 to 1997.  At the 2015 Diocesan Convention, Bishop Waynick announced plans to retire, and called for the election of a new bishop to be consecrated in 2017.  She was succeeded by Jennifer Baskerville-Burrows on April 29, 2017.

Judicial vicar: In the Roman Catholic Church, a judicial vicar or episcopal official (Latin: officialis ) is an officer of the diocese who has ordinary power to judge cases in the diocesan ecclesiastical court.  Although the diocesan bishop can reserve certain cases to himself, the judicial vicar and the diocesan bishop are a single tribunal, which means that decisions of the judicial vicar cannot be appealed to the diocesan bishop but must instead be appealed to the appellate tribunal.  The judicial vicar (or "officialis" ) ought to be someone other than the vicar general, unless the smallness of the diocese or the limited number of cases suggest otherwise.  Other judges, who may be priests, deacons, religious brothers or sisters or nuns, or laypersons, and who must have knowledge of canon law and be Catholics in good standing, assist the judicial vicar either by deciding cases on a single judge basis or by forming with him a panel over which he or one of them presides.  A judicial vicar may also be assisted by adjutant judicial vicars (or "vice-officiales").  The judicial vicar is assisted by at least one, if not more, individuals with the title defender of the bond, they are normally priests, but do not have to be.  On staff will also be notaries and secretaries, who may be priests, religious brothers or sisters or nuns, or laypersons.

Supporting paragraphs: Catherine Waynick Jennifer Baskerville-Burrows
Answer: 2015 Diocesan Convention