Question: What river flows through the city where Auguste Henri Vildieu worked?

full_context: Document 1: 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 2: César Boutteville: The son of a French father and a Vietnamese mother, Cesar Boutteville was born in Thin-Hao (or Thịnh Hào), nowadays part of Hanoi's urban district Dong Da. He moved with his family to France in 1929.
Document 3: St. Joseph's Cathedral, Hanoi: Construction began in 1886, with the architectural style described as resembling Notre Dame de Paris. The church was one of the first structures built by the French colonial government in Indochina when it opened in December 1886. It is the oldest church in Hanoi.
Document 4: 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 5: France–Vietnam relations: French -- Vietnamese relations started as early as the 17th century with the mission of the Jesuit father Alexandre de Rhodes. Various traders would visit Vietnam during the 18th century, until the major involvement of French forces under Pigneau de Béhaine from 1787 to 1789 helped establish the Nguyễn Dynasty. France was heavily involved in Vietnam in the 19th century under the pretext of protecting the work of Catholic missionaries in the country. France progressively carved for itself a huge colony, which would form French Indochina in 1887. France continued to rule Vietnam as a colony until France's defeat in the First Indochina War and the proclamation of Vietnam's independence in 1954.
Document 6: 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 7: 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 8: Presidential Palace, Hanoi: The Presidential Palace of Vietnam, located in the city of Hanoi, was built between 1900 and 1906 to house the French Governor-General of Indochina.
Document 9: 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 10: 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 11: 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 12: Auguste Henri Vildieu: Auguste Henri Vildieu was the French architectural adjutant in Hanoi while that city was an administrative center for the French colony of Indochina. Vildieu constructed several grand European-style buildings for the colonial government, including:
Document 13: 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 14: Lycée Albert Sarraut: Lycée Albert Sarraut was a French lyceum in Hanoi, Vietnam, during the French colonial period, active from 1919 to 1965. It was one of 69 high schools founded by the French in their colonies worldwide, named for Albert Sarraut. The school offered high standard academic programs for students between the ages of 11 and 18.
Document 15: 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.
ground_truth: Red River
sub_queries: Auguste Henri Vildieu >> work location Answer: Hanoi
Hanoi >> located in or next to body of water Answer: Red River