Question: In what city are both Sibley Memorial Hospital and Howard University Hospital located?

Context paragraphs:
Martin University Hospital: The Martin University Hospital (Slovak: "Univerzitná nemocnica Martin" , abbreviated to UNM) is a Slovak public university hospital located in the Martin municipality, in the county of Zilina, north-east of the Slovak capital Bratislava.  It is a teaching hospital and it is the main university hospital affiliated with the Jessenius School of Medicine.  The hospital has over 1,700 employees.  Martin University Hospital has 900 beds in total including all sectors.

Sibley Memorial Hospital: Sibley Memorial Hospital is a non-profit hospital located in The Palisades neighborhood of Washington D.C. It is fully accredited by the Joint Commission on Accreditation of Healthcare Organizations, and is licensed by the District of Columbia Department of Health and Human Services.  The hospital specializes in surgery, orthopedics, and oncology services.  It has been part of Johns Hopkins Medicine since 2010.

Memorial Hospital (Chattanooga): Memorial Hospital is a hospital located in Chattanooga, Tennessee.  It was officially opened on January 2, 1952.  Memorial Hospital is a member of The American Hospital Association, The Tennessee Hospital Association, The Catholic Hospital Association, The Chattanooga Area Hospital Council, and The Chattanooga Area Safety Council.  Memorial Hospital has grown tremendously since 1952.  In 1952, Memorial Hospital had 200 beds.  Today, the hospital has 365 hospital beds.  It has nearly doubled in size over the 62 years since it opened.  Memorial is a general hospital that has a wide variety of specialties.  They have surgical, cardiac, interventional, cancer, orthopedic, and general care services.  Memorial is known as a leader in Cardiology.  Memorial is not a teaching hospital but they are a leader in new technology.

University Hospital (Augusta, Georgia): University Hospital is a non-profit 581-bed private hospital located in downtown Augusta, Georgia.  Established in 1818, it is the second-oldest hospital in Georgia.  Although University Hospital is considered a teaching institution, it does not currently sponsor an academic program resulting in a degree.  University Hospital is no longer directly affiliated with the Medical College of Georgia or Augusta University.  University Hospital is a fully private hospital receiving no local or state funding.

Santa Rosa Memorial Hospital: Santa Rosa Memorial Hospital is a 278 bed acute care hospital located in the city of Santa Rosa, California, which is in Sonoma County.  The hospital, known as "Memorial", is part of the St. Joseph Health hospital system.  It serves a population of over 500,000 people living in the greater Sonoma County area.  Memorial Hospital is the regional Level II Trauma Center for Sonoma County, Lake County, Mendocino County, Napa County, and the Marin County coastal region.

Southend University Hospital NHS Foundation Trust: Southend University Hospital NHS Foundation Trust (also known as Southend University Hospital and commonly referred to as Southend Hospital) is an NHS hospital located in Westcliff-on-Sea, Southend-on-Sea, Essex, England.  Southend University Hospital has 157 consultants providing various services, and serves a catchment area with a population of about 350,000.  It has officially been designated cancer centre status, and has also gained NHS Foundation Trust status under the name Southend University Hospital NHS Foundation Trust.  More importantly Southend University Hospital is home to Funky Towers, broadcasting across Southend and surrounding areas, 103.7 on your dial, keep it real, keep it funky.

Lucy Webb Hayes National Training School: Lucy Webb Hayes National Training School was a religious training school, now a hospital, in Washington, D.C. So named in memory of Lucy Webb Hayes, the wife of former President Rutherford B. Hayes, it was founded in 1891.  It was the authorized training school of the Woman’s Home Missionary Society (now, Home Mission Society) of the Methodist Episcopal Church, which owned the property of the school, exercised supervision and jurisdiction over its management, and looked to it to supply the trained workers employed by the society in its widely diversified fields of labor.  The privileges of the school were not, however, confined to those connected with the Woman’s Home Missionary Society.  It opened its doors to all who wanted to prepare themselves for any department of Christian activity.  In 1894, the school was chartered by act of Congress in conjunction with the Deaconess Home and Sibley Memorial Hospital, and formed with them one corporation.  The unified administration and guaranteed the training of Christian workers.

Tomoaki Kato: Tomoaki Kato, M.D., is a noted pioneer in multiple-organ transplantation, pediatric and adult liver transplantation.  Kato is Surgical Director of Adult and Pediatric Liver and Intestinal Transplantation at NewYork-Presbyterian Hospital/Columbia University Medical Center and is a professor of surgery at Columbia University College of Physicians and Surgeons.  Kato is also known for unique and innovative surgeries for adults and children, including a six-organ transplant; a procedure called APOLT (auxiliary partial orthotopic liver transplantation) that resuscitates a failing liver by attaching a partial donor liver, making immunosuppressant drugs unnecessary; and the first successful human partial bladder transplantation involving the transplant of two kidneys together with ureters connected to a patch of the donor bladder.  In a highly publicized case, he led the first reported removal and re-implantation, or auto-transplantation, of six organs to excise a hard-to-reach abdominal tumor.  Previously the director of pediatric liver and gastrointestinal transplant and professor of clinical surgery at the University of Miami School of Medicine, Kato received his medical degree from the Osaka University Medical School in Japan and received his residency training in surgery at Osaka University Hospital and Itami City Hospital in Hyogo, Japan.  He completed a clinical fellowship in transplantation at the University of Miami/Jackson Memorial Hospital, in Miami, Florida, where he was subsequently appointed to the surgical faculty in 1997, and promoted to full professor in 2007.  He served as a surgeon and senior leader of the liver and transplantation center at Miami's Jackson Memorial Hospital, beginning in 1997, and at University of Miami Hospital (previously Cedars Medical Center), beginning in 2004.  Kato is a member of numerous professional and honorary organizations, and the author or co-author of more than 180 scientific papers in peer-reviewed journals.

Howard University Hospital: Howard University Hospital, previously known as Freedmen's Hospital, is a major hospital lcated in Washington, D.C., built on the site of the previous Griffith Stadium.  The hospital has served the African American community in the area for over 150 years, having been established in 1862 to cater for the medical needs of the thousands of African Americans who came to Washington during the Civil War, seeking their freedom.  The first hospital of its kind to provide medical treatment for former slaves, it later became the major hospital for the area's African-American community.  Following the closure of D.C. General Hospital, As of 2016, the hospital has the highest rate of wrongful death lawsuits of any health facility in Washington D.C. over the previous decade.

University Hospital Limerick: University Hospital Limerick (formerly known as Limerick Regional Hospital or Mid-Western Regional Hospital, Limerick) is a hospital located in Dooradoyle, Limerick, Ireland.  It is managed by the Irish Government's Health Service Executive and provides acute-care hospital services, including a 24-hour emergency department, for the population of Ireland's Mid West Region, encompassing; counties Limerick, Clare, North Tipperary, and South Tipperary.  In 2008, the hospital served 120,316 out-patients, and 23,014 in-patients, with an average stay of 5.8 nights.  72.8% of admissions were made via the accident and emergency department or 16,720 patients.  In total, 56,528 patients presented to the emergency department in 2008.  The hospital saw 20,143-day cases in the same year.  In July 2011, it was reported that the hospital would undergo its third name change in five years to become University Hospital Limerick following the establishment of the Graduate Medical School at the University of Limerick which is affiliated to the hospital.

Supporting paragraphs: Howard University Hospital Sibley Memorial Hospital
Answer: Washington, D.C.