Question: By which body of water is the city served by Bach Mai Airfield?

full_context: Document 1: Caiyuanba Bridge: The Caiyuanba Bridge is an arch bridge which crosses the Yangtze River in Chongqing, China. Completed in 2007, the arch spans ranking among the longest arch bridges in the world. The bridges carries 6 lanes of traffic and two track of Chongqing Rail Transit Line 3 between the Nan'an District south of the Yangtze River and the Yuzhong District to the north.
Document 2: Battle of Dien Bien Phu: Date 13 March -- 7 May 1954 (1 month, 3 weeks and 3 days) Location 21 ° 23 ′ 13 ''N 103 ° 0 ′ 56'' E ﻿ / ﻿ 21.38694 ° N 103.01556 ° E ﻿ / 21.38694; 103.01556 Coordinates: 21 ° 23 ′ 13 ''N 103 ° 0 ′ 56'' E ﻿ / ﻿ 21.38694 ° N 103.01556 ° E ﻿ / 21.38694; 103.01556 Vicinity of Điện Biên Phủ, Vietnam Result Decisive Viet Minh victory Termination of French involvement in Indochina Signing of Geneva Conference (1954) End of the First Indochina War Territorial changes Vietnam is temporarily divided at the 17th Parallel
Document 3: Paris: The Pagode de Vincennes Buddhist temple, near Lake Daumesnil in the Bois de Vincennes, is the former Cameroon pavilion from the 1931 Paris Colonial Exposition. It hosts several different schools of Buddhism, and does not have a single leader. It shelters the biggest Buddha statue in Europe, more than nine metres high. There are two other small temples located in the Asian community in the 13th arrondissement. A Hindu temple, dedicated to Ganesh, on Rue Pajol in the 18th arrondissement, opened in 1985.
Document 4: Mỹ Sơn: In 1937, French scholars began to restore the temples at Mỹ Sơn. In 1937 and 1938, the main temple known as "A1" and the smaller temples surrounding it were restored. Other major temples were restored between 1939 and 1943. However, many historical buildings were destroyed during the Vietnam War. United States B52 aircraft carpet-bombed the region in August 1969. The surrounding area is still rendered dangerous through the presence of unexploded land mines.
Document 5: French Indochina: A grouping of the three Vietnamese regions of Tonkin (north), Annam (centre), and Cochinchina (south) with Cambodia was formed in 1887. Laos was added in 1893 and the leased Chinese territory of Guangzhouwan in 1898. The capital was moved from Saigon (in Cochinchina) to Hanoi (Tonkin) in 1902 and again to Da Lat (Annam) in 1939. In 1945 it was moved back to Hanoi.
Document 6: Manampitiya Bridge: Manampitiya Bridge is the second longest bridge in Sri Lanka with a length of 302 metres. It comprises 2 bridges, an early-twentieth-century steel bridge which is used for railway and a newly built bridge carrying 2 lanes of highway. Before the Kinniya Bridge was declared open in 2009, it was the longest bridge in Sri Lanka. The steel bridge was built in 1922, during the colonial rule. It is 291 metres long and less than 5 metres in width. Bridge is located 81 kilometres east of Maradankadawala, along the A11 Habarana-Thirikondiyadimadu road in Polonnaruwa District, linking North Central Province with Eastern Province over Mahaweli River. The new bridge in Manampitiya was built with financial assistance of Japan, hence the name Sri Lanka-Japan Friendship Peace Bridge. Japan International Cooperation Agency (JICA) provided LKR 1.3 billion on behalf of the Japanese government. Bridge was declared open on 25 October 2007 by President Mahinda Rajapaksa. The new 50 Sri Lankan Rupee note depicts the Manampitiya Bridge.
Document 7: Roye-Amy Airfield: Originally a 1930s airport which was seized by the Germans during the Battle of France, it was used by the Luftwaffe, then by the United States Army Air Forces during World War II. After the war, the site was abandoned and is now agricultural fields.
Document 8: José Antunes Sobrinho: The Juscelino Kubitschek bridge, also known as the 'President JK Bridge' or the 'JK Bridge', crosses Lake Paranoá in Brasília. It is named after Juscelino Kubitschek de Oliveira, former president of Brazil. It was designed by architect Alexandre Chan and structural engineer Mário Vila Verde. Chan won the Gustav Lindenthal Medal for this project at the 2003 International Bridge Conference in Pittsburgh due to "...outstanding achievement demonstrating harmony with the environment, aesthetic merit and successful community participation".
Document 9: Nhật Tân Bridge: The Nhật Tân Bridge (or "Vietnam–Japan Friendship Bridge") is a cable-stayed bridge crossing the Red River in Hanoi, inaugurated on January 4, 2015. It forms part of a new six-lane highway linking Hanoi and Noi Bai International Airport. The project is funded by a Japan International Cooperation Agency ODA loan.
Document 10: 22 Gia Long Street: 22 Gia Long Street, now 22 Lý Tự Trọng Street, is an apartment building in Ho Chi Minh City, then called Saigon, that became an icon of the Fall of Saigon when chosen as an assembly point for Operation Frequent Wind in 1975. A Dutch photographer, Hubert van Es, working for UPI, took a photograph that captured the chaotic final days of the Vietnam War, which many people believed showed desperate Americans crowding on to the roof of the United States Embassy to board a helicopter. The building in fact was an apartment building that housed employees of the United States Agency for International Development (USAID), with its top floor reserved for the Central Intelligence Agency's deputy chief of station.
Document 11: Saigon Bridge: Saigon Bridge, known as Newport Bridge () before 1975, is a bridge crossing the Saigon River, connecting Bình Thạnh District and District 2, Ho Chi Minh City, on the Hanoi Highway. The bridge has four lanes for cars and two lanes for motorcycles and bicycles. It was the only bridge linking District 1 to the new Thu Thiem New Urban Area in District 2 until the Thủ Thiêm Bridge opened in 2008 and the Saigon River Tunnel opened in 2011. The bridge was one of the most vital gateways for vehicles traveling from northern and central Vietnam to the city, and therefore was a key point of contention during the Tet Offensive in 1968 and the Fall of Saigon in 1975. In 2013, a new parallel bridge, Saigon 2 Bridge, was opened to ease congestion on the bridge.
Document 12: Aioi Bridge: The is an unusual "T"-shaped three-way bridge in Hiroshima, Japan. The original bridge, constructed in 1932, was the aiming point for the 1945 Hiroshima atom bomb because its shape was easily recognized from the air. Although the bridge was not destroyed by the atomic blast, it did sustain heavy damage. After the war, the bridge was repaired and remained in service for nearly four decades, before it was replaced by a new bridge (built as a replica) in 1983. A surviving portion of a floor girder from the original bridge was subsequently donated to the Hiroshima Peace Memorial Museum.
Document 13: Vietnam Veterans Memorial Bridge (Richmond): Vietnam Veterans Memorial Bridge carries the Pocahontas Parkway, signed as State Route 895, across the James River between the independent city of Richmond and Henrico County. Crossing the southernmost extremity of Richmond, it provides a connection between Henrico and the southern end of Chippenham Parkway near U.S. Route 1 in Chesterfield County, Virginia.
Document 14: Museum of Vietnamese History: The Museum of Vietnamese History is located at 2 Nguyen Binh Khiem Street, Ben Nghe Ward, District 1, in Ho Chi Minh City, Vietnam. Formerly known as the Musée Blanchard de la Brosse, built by Auguste Delaval in 1926, and The National Museum of Viet Nam in Sai Gon, it received its current name in 1979. It is a museum showcasing Vietnam's history with exhibits from all periods. It should not be confused with the National Museum of Vietnamese History in Hanoi. The topics covered by the exhibits include the following:
Document 15: Bach Mai Airfield: Bach Mai Airfield () is a disused military airport in Thanh Xuan District, Hanoi, Vietnam, located along modern-day Le Trong Tan street. It was constructed by the French in 1917 and used by French forces until 1954; along with Gia Lam Airbase, it was one of the major logistics bases supporting French operations at Dien Bien Phu. After 1954, it was used by the Vietnamese People's Air Force and served as their air defense command and control center during the Second Indochina War, playing a part in the Cambodian–Vietnamese War as well. It is now the site of the Vietnam People's Air Force Museum, where a number of period military aircraft are on display.
ground_truth: Red River
sub_queries: Bach Mai Airfield >> place served by transport hub Answer: Hanoi
Hanoi >> located in or next to body of water Answer: Red River