Question: What river flows through the city where the college softball world series is played?

full_context: Document 1: 2017 NCAA Division I Women's Basketball Tournament: The 2017 NCAA Women's Division I Basketball Tournament was played from Friday, March 17 to Sunday, April 2, 2017, with the Final Four played at the American Airlines Center in Dallas, Texas on March 31 and April 2. This was the first time the women's Final Four was played in Dallas and the first time since 2002 that the Final Four games were played on Friday and Sunday, rather than Sunday and Tuesday. South Carolina defeated Mississippi State to win the championship.
Document 2: 2017 NCAA Division I Softball Tournament: The 2017 NCAA Division I Softball Tournament is being held from May 18 through June 7, 2017 as the final part of the 2017 NCAA Division I softball season. The 64 participating NCAA Division I college softball teams were selected out of an eligible 293 teams on May 14, 2017. Thirty - two teams were awarded automatic bids as champions of their conferences, and the remaining 32 were selected at - large by the NCAA Division I softball selection committee. The tournament culminates with eight teams playing in the 2017 Women's College World Series at ASA Hall of Fame Stadium in Oklahoma City. Oklahoma would repeat as National Champions, defeating Florida in 2 games.
Document 3: Oklahoma City: The city is roughly bisected by the North Canadian River (recently renamed the Oklahoma River inside city limits). The North Canadian once had sufficient flow to flood every year, wreaking destruction on surrounding areas, including the central business district and the original Oklahoma City Zoo. In the 1940s, a dam was built on the river to manage the flood control and reduced its level. In the 1990s, as part of the citywide revitalization project known as MAPS, the city built a series of low-water dams, returning water to the portion of the river flowing near downtown. The city has three large lakes: Lake Hefner and Lake Overholser, in the northwestern quarter of the city; and the largest, Lake Stanley Draper, in the sparsely populated far southeast portion of the city.
Document 4: 2016 NCAA Division I Softball Tournament: The 2016 NCAA Division I Softball Tournament was held from May 20 through June 8, 2016 as the final part of the 2016 NCAA Division I softball season. The 64 NCAA Division I college softball teams were to be selected out of an eligible 293 teams on May 15, 2016. Thirty - two teams were awarded an automatic bid as champions of their conference, and thirty - two teams were selected at - large by the NCAA Division I softball selection committee. The tournament culminated with eight teams playing in the 2016 Women's College World Series at ASA Hall of Fame Stadium in Oklahoma City in which the Oklahoma Sooners were crowned the champions.
Document 5: Oklahoma City: In 1993, the city passed a massive redevelopment package known as the Metropolitan Area Projects (MAPS), intended to rebuild the city's core with civic projects to establish more activities and life to downtown. The city added a new baseball park; central library; renovations to the civic center, convention center and fairgrounds; and a water canal in the Bricktown entertainment district. Water taxis transport passengers within the district, adding color and activity along the canal. MAPS has become one of the most successful public-private partnerships undertaken in the U.S., exceeding $3 billion in private investment as of 2010. As a result of MAPS, the population living in downtown housing has exponentially increased, together with demand for additional residential and retail amenities, such as grocery, services, and shops.
Document 6: Women's College World Series: The Women's College World Series (WCWS) is the final portion of the NCAA Division I Softball Championship for college softball in the United States. The tournament format consists of two four - team double - elimination brackets. The winners of each bracket then compete in a best - of - three series to determine the Division I WCWS National Champion. The WCWS takes place at ASA Hall of Fame Stadium in Oklahoma City. From 1969 to 1981, the women's collegiate softball championship was also known as the Women's College World Series and was promoted as such. During 1969 -- 1979, the series was played in Omaha, and in 1980 -- 1982 in Norman, Oklahoma. The NCAA held its first six Division I tournaments in Omaha in 1982 -- 1987, followed by Sunnyvale, California in 1988 -- 1989. The event has been held in Oklahoma City every year since then, except for 1996 in Columbus, Georgia.
Document 7: 2017 NCAA Division I Women's Basketball Tournament: The 2017 NCAA Women's Division I Basketball Tournament was played from Friday, March 17 to Sunday, April 2, 2017, with the Final Four played at the American Airlines Center in Dallas, Texas on March 31 and April 2. This was the first time that the women's Final Four was played in Dallas and the first time since 2002 that the Final Four games were played on Friday and Sunday, rather than Sunday and Tuesday. South Carolina defeated Mississippi State to win the championship.
Document 8: Dammam: Having been built from the ground up, the Dammam Area was designed from the outset on the principles of modern urban planning. Residential areas are separate from commercial sections, roads are broad and straight and buildings conform to a master plan. One of the main features of the development of the area is land reclamation. Vast stretches of the shallow Persian Gulf waters have been filled, with hotels and office buildings occupying what were once marshes. Water for household, urban and industrial use is provided by desalination plants that supply approximately seven million cubic feet of treated water to the area each day. The availability of water underpins the urban and industrial growth of the Dammam Area, and provisions have been made for expanding existing desalination facilities to meet future growth.
Document 9: Oklahoma City: Oklahoma City is the annual host of the Big 12 Baseball Tournament, the World Cup of Softball, and the annual NCAA Women's College World Series. The city has held the 2005 NCAA Men's Basketball First and Second round and hosted the Big 12 Men's and Women's Basketball Tournaments in 2007 and 2009. The major universities in the area – University of Oklahoma, Oklahoma City University, and Oklahoma State University – often schedule major basketball games and other sporting events at Chesapeake Energy Arena and Chickasaw Bricktown Ballpark, although most home games are played at their campus stadiums.
Document 10: Oklahoma City: Walking trails line Lake Hefner and Lake Overholser in the northwest part of the city and downtown at the canal and the Oklahoma River. The majority of the east shore area is taken up by parks and trails, including a new leashless dog park and the postwar-era Stars and Stripes Park. Lake Stanley Draper is the city's largest and most remote lake.
Document 11: College World Series: The College World Series (CWS) is an annual June baseball tournament held in Omaha, Nebraska. The CWS is the culmination of the National Collegiate Athletic Association (NCAA) Division I Baseball Championship tournament -- featuring 64 teams in the first round -- which determines the NCAA Division I college baseball champion. The eight participating teams are split into two, four - team, double - elimination brackets, with the winners of each bracket playing in a best - of - three championship series.
Document 12: Mexico City: Originally much of the valley laid beneath the waters of Lake Texcoco, a system of interconnected salt and freshwater lakes. The Aztecs built dikes to separate the fresh water used to raise crops in chinampas and to prevent recurrent floods. These dikes were destroyed during the siege of Tenochtitlan, and during colonial times the Spanish regularly drained the lake to prevent floods. Only a small section of the original lake remains, located outside the Federal District, in the municipality of Atenco, State of Mexico.
Document 13: Lake Texcoco: Tenochtitlan was founded on an islet in the western part of the lake in the year 1325. Around it, the Aztecs created a large artificial island using a system similar to the creation of chinampas. To overcome the problems of drinking water, the Aztecs built a system of dams to separate the salty waters of the lake from the rain water of the effluents. It also permitted them to control the level of the lake. The city also had an inner system of channels that helped to control the water.
Document 14: Palermo: Today both the Papireto river and the Kemonia are covered up by buildings. However, the shape of the former watercourses can still be recognised today, because the streets that were built on them follow their shapes. Today the only waterway not drained yet is the Oreto river that divides the downtown of the city from the western uptown and the industrial districts. In the basins there were, though, many seasonal torrents that helped formed swampy plains, reclaimed during history; a good example of which can be found in the borough of Mondello.
Document 15: Oklahoma City: Oklahoma City has a major park in each quadrant of the city, going back to the first parks masterplan. Will Rogers Park, Lincoln Park, Trosper Park, and Woodson Park were once connected by the Grand Boulevard loop, some sections of which no longer exist. Martin Park Nature Center is a natural habitat in far northwest Oklahoma City. Will Rogers Park is home to the Lycan Conservatory, the Rose Garden, and Butterfly Garden, all built in the WPA era. Oklahoma City is home to the American Banjo Museum, which houses a large collection of highly decorated banjos from the early 20th century and exhibits on the history of the banjo and its place in American history. Concerts and lectures are also held there.
ground_truth: North Canadian River
sub_queries: where is the college softball world series played Answer: Oklahoma City
What river flows through Oklahoma City ? Answer: North Canadian River