Question: Children's National Medical Center and Sibley Memorial Hospital, are both located in which US location?
Context: Sutter General Hospital, part of the Sutter Health network, is located in midtown, Sacramento next to the historic Sutter's Fort State Park.  It is also directly adjacent to the Capital City Freeway (Business Route 80).  The hospital is housed in a five-story building.  It is one of two acute-care hospitals that are part of Sutter Medical Center, Sacramento, which also consists of Sutter Memorial Hospital, which is located just 2 miles away in East Sacramento and has been called "the baby hospital" because more than 300,000 babies have been born there.  Sutter General Hospital has 306 beds.  The hospital focuses on general acute medical/surgical care as well as a medical base to advanced services for cancer, orthopedics, spine, and neurology and neurosurgery.  Sutter Memorial Hospital houses cardiac care.  Sutter Medical Center, Sacramento is currently undergoing a major expansion which is detailed here: Sutter Hospital Expansion. 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. Medical/Market Center station is a Trinity Railway Express commuter rail station in Dallas, Texas.  It is located at Motor Street and Medical Center Drive along the Stemmons Corridor (Interstate 35E) in North Dallas.  It opened on December 30, 1996 and serves Dallas Market Center and the nearby medical district which includes Parkland Memorial Hospital, Children's Medical Center of Dallas, University of Texas Southwestern Medical Center, St. Paul Medical Center and Zale Lipshy University Hospital. Established in 1891, OhioHealth is a not-for-profit, faith-based system of hospitals and healthcare providers located in Columbus, Ohio and surrounding areas.  As of 2012, the organization has 21,000 physicians, associates and volunteers and more than $2 billion in net revenue.  The system consists of 17 hospitals, 20 health and surgery centers, home-health providers, medical equipment and health service suppliers throughout a 40-county area.  Member hospitals include Riverside Methodist Hospital, Grant Medical Center, Doctors Hospital, Grady Memorial Hospital, Dublin Methodist Hospital, Hardin Memorial Hospital, Marion General Hospital, MedCentral Mansfield Hospital, Doctors Hospital at Nelsonville & O'Bleness Memorial Hospital (Jan. 2014) in Athens, OH.  OhioHealth is a ministry of the West Ohio Conference of the United Methodist Church. Baylor College of Medicine (BCM), located in the Texas Medical Center in Houston, Texas, US, is a health sciences university.  It includes a medical school, Baylor College of Medicine; the Graduate School of Biomedical Sciences; the School of Allied Health Sciences; and the National School of Tropical Medicine.  The school, located in the middle of the world's largest medical center (Texas Medical Center), is part owner of Baylor St. Luke's Medical Center, part of the CHI St. Luke's Health system, and has hospital affiliations with: Harris Health System, Texas Children's Hospital, The University of Texas MD Anderson Cancer Center, Memorial Hermann - The Institute for Rehabilitation and Research, Menninger Clinic, the Michael E. DeBakey Veterans Affairs Medical Center and Children's Hospital of San Antonio. Memorial Hermann–Texas Medical Center is a nationally ranked hospital at the Texas Medical Center.  It is the first hospital founded in the Texas Medical Center in Houston, Texas (and its founding predates the Texas Medical Center).  Founded in 1925, it is the primary teaching hospital for McGovern Medical School (formerly The University of Texas Medical School at Houston (UTHealth Medical School)) and the flagship location of 13 hospitals in the Memorial Hermann Healthcare System.  It is one of three certified Level I Trauma Centers in the greater Houston area.  The Memorial Hermann Life Flight air ambulance service operates its fleet of helicopters from Memorial Hermann–Texas Medical Center.  The hospital has 33,614 admissions and performs 14,937 inpatient and 3,972 outpatient surgeries. ThedaCare Regional Medical Center-Appleton, formerly "Appleton Medical Center" (1984-2015), and "Appleton Memorial Hospital" (1958-1984), serves the northern side of the city of Appleton, Wisconsin.  The hospital was chartered by the State of Wisconsin in 1949.  After a 12-year fundraising effort, Appleton Memorial Hospital opened in 1958.  The hospital was renamed Appleton Medical Center in 1984.  In 1987, this hospital merged financially with ThedaCare Regional Medical Center-Neenah to form the Novus Health Group, now called ThedaCare. Children’s National Medical Center (formerly DC Children’s Hospital) is ranked among the top 10 children’s hospitals in the country by "U.S. News & World Report."  Located just north of the McMillan Reservoir and Howard University, it shares grounds with Washington Hospital Center, National Rehabilitation Hospital, and the DC Veterans Affairs Medical Center.  Kurt Newman, M.D., has served as the president and chief executive officer of Children’s National since 2011.  Children's National is a not-for-profit institution that performs more than 450,000 visits each year.  Featuring 303 beds and a Level IV NICU, Children's National is the regional referral center for pediatric emergency, trauma, cancer, cardiac and critical care as well as neonatology, orthopaedic surgery, neurology and neurosurgery. 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. Sutter Medical Center, Sacramento is a medical center in Sacramento, California that has been named one of the Top 100 Hospitals in the nation for five years, including 2013-2015.  It is owned and operated by Sutter Health, a Northern California not-for-profit health system.  Sutter Medical Center, Sacramento offers both community-based and tertiary medical services.  In 2015, Sutter Medical Center, Sacramento (SMCS) consolidated its Sutter Memorial Hospital campus in East Sacramento with its midtown Sutter General Hospital location, with the opening of the Anderson Lucchetti Women's and Children's Center and the complete remodeling of Sutter General Hospital into the Ose Adams Medical Pavilion.  The midtown location is where Sutter Health's first hospital, Sutter Hospital, opened in 1923.  Sutter Medical
Answer: Washington D.C.