Question: Sudan Interior Church has a congregation in what capital of Sudan?

Context paragraphs:
Kale Heywet Word of Life Church: Kale Heywet (Word of Life) Church (KHC) is the largest evangelical denomination in Ethiopia.  Started in the early 1920s by pioneering Serving In Mission, formerly, Sudan Interior Mission, (SIM) missionaries, Kale Heywet Church thrived in the south-central and south-western corners of the country during the five-year Italian occupation in the 1930s.

Sudan Interior Church: The Sudan Interior Church is a Reformed denomination in Sudan.  It started in 1937, and become autonomous in 1963.  Congregations are in Khartoum, Upper Nile and Blue Nile Province.  It has 25,000 members and 120 parishes.  A member of the Baptist World Alliance.

Sudan Evangelical Presbyterian Church: Sudan Evangelical Presbyterian Church (SEPC) was started by American missionaries of the Presbyterian Church in the USA in the northern part of Sudan.  Missionaries were expelled in 1964.  SEPC has grown since then in northern and western Sudan as well as in South Sudan as a large percentage of SEPC members moved there to anticipation of forming a new country.  The Sudan Evangelical Presbyterian Church is currently under the leadership of Bishop Elias Taban, and desires to plant churches in the Muslim northern Sudan as well as South Sudan.

Khartoum: Khartoum ( ) is the capital and largest city of Sudan and the state of Khartoum.  It is located at the confluence of the White Nile, flowing north from Lake Victoria, and the Blue Nile, flowing west from Ethiopia.  The location where the two Niles meet is known as ""al-Mogran"" (المقرن " the confluence ").  The main Nile continues to flow north towards Egypt and the Mediterranean Sea.

Sudan Council of Churches: The New Sudan Council of Churches (NSCC) is an organization comprising six churches located in Southern Sudan: the Roman Catholic Church, Episcopal Church of the Sudan, Presbyterian Church of Sudan, African Inland Church, Sudan Pentecostal Church, and Sudan Interior Church.  Formed in 1989-1990 under Bishop Paride Taban, the NSCC has acted as a facilitator in peace negotiations during the Second Sudanese Civil War.  Along with its stated goal of Christian fellowship, it is active in reconciliation advocacy and human rights.

Serving In Mission: SIM is an international, interdenominational Christian mission organization.  It was established in 1893 by its three founders, Walter Gowans and Rowland Bingham of Canada and Thomas Kent of the United States.  The initials originally stood for "Soudan Interior Mission," Soudan being an older spelling of the Sudan region of West Africa.  After various name changes and mergers, the mission simply goes by "SIM" today.  In French-speaking countries it is known as "Société Internationale Missionnaire."  It is made up of united organizations that began more than 100 years ago, including Africa Evangelical Fellowship, Andes Evangelical Mission, International Christian Fellowship and Sudan Interior Mission.  SIM is also a member of the Forum of Bible Agencies International.

Elias Taban: Bishop Elias Taban (born May 10, 1955) is founder of the Evangelical Presbyterian Church of Sudan and the non-profit Water is Basic.  A former child soldier, Taban holds a diploma in civil engineering and an advanced diploma in theology.  He served as a Colonel in the Sudan People's Liberation Army (SPLA) during the second civil war before becoming an advocate for peace who is widely respected by the governments of Sudan and South Sudan.  The Bishop's ministry has focused on building wells, orphanages, schools, and health clinics, as well as advocating for the Arms Trade Treaty.  From 2003 to the present, Bishop Taban has served as the President of the Sudan Evangelical Alliance.  He and his wife Annegrace live in Yei South Sudan with their five adopted children.

CIA activities in Sudan: Sudan has at least two conflicts: the Second Sudanese Civil War, now in a power-sharing agreement between the Northern Sudanese of Khartoum and the semi-autonomous South Sudan, with a capital in Juba, and a second conflict in the Darfur area of western Sudan.  The Khartoum government had, in the past, given sanctuary to trans-national Islamic terrorists, but, according to the 9/11 Commission Report, ousted al-Qaeda and cooperated with the US against such groups while simultaneously involving itself in human rights abuses in Darfur.  There are also transborder issues between Chad and Darfur, and, to a lesser extent, with the Central African Republic.  South Sudan and its Sudan People's Liberation Army (SPLA) and Uganda are now cooperating against, and negotiating with, the Lord's Resistance Army, a transnational terrorist group that had been encouraged to attack South Sudan by North Sudan.

Martha Wall: Martha Alma Wall (March 22, 1910 – August 2, 2000) was an American Christian medical missionary, philosopher, nurse, and author who is best known for her humanitarian work providing health care to lepers in British Nigeria during the 1930s and 1940s with the Sudan Interior Mission (SIM).  She was born in Hillsboro, Kansas to a traditional Christian family and was a devout member of both the non-denominational Salina Bible Church and the Baptist Women's Union.  She became a registered nurse and studied theology at Tabor College before leaving for a medical mission in British Nigeria in 1938.  After returning to America, Wall worked as a Clinical Supervisor of Vocational Nurses for Kern General Hospital during the 1950s and as an instructor and director of nursing services for Bakersfield College during the 1960s.  Throughout her adult life, she was a dedicated member of the California State Licensed Vocational Nurses Association.  Wall is noted as founder of the Children's Welfare Center at the Katsina Leper Settlement.  She documented her missionary work in Sub-Saharan Africa in the book she authored "Splinters from an African Log", which was published in 1960.

Evangelical Church Winning All: The Evangelical Church Winning All, previously known as the Evangelical Church of West Africa, is one of the largest Christian denominations in Nigeria, with about five million members.  ECWA is a partner church of the international Christian mission organisation, Serving In Mission (SIM), formerly Sudan Interior Mission.  ECWA was founded in 1954 when the SIM-related churches (initially in Nigeria) came together to form an indigenous body.  Since that time, mission stations, Bible Schools, academic schools, and medical programs have been transferred to ECWA leadership.

Supporting paragraphs: Sudan Interior Church Khartoum
Answer: Khartoum