Question: What river flows through the birthplace of Philip Long?

full_context: Document 1: Ryan Longwell: Ryan Walker Longwell (born August 16, 1974), is a retired American football kicker. After playing college football for the California Golden Bears, he started his professional football career with the San Francisco 49ers, but never played a game for the franchise. He then played for the Green Bay Packers from 1997 to 2005. He played for the Minnesota Vikings from 2006 to 2011. He also played briefly for the Seattle Seahawks during the 2012 playoffs.
Document 2: Wang Xiaolong: With the chance to return to his hometown and join reigning champions Beijing Guoan, Wang Xiaolong would make the switch from Shandong to Beijing at the beginning of the 2010 league season with teammate Wu Hao in a package deal.
Document 3: 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.
Document 4: 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 5: Phí Minh Long: Phí Minh Long (born 11 February 1995) is a Vietnamese footballer who plays as a goalkeeper for V-League (Vietnam) club Hanoi FC
Document 6: Phillip Long: Phillip Long (born May 16, 1983 in Oklahoma City, Oklahoma) is an American soccer midfielder who spent two seasons with the Carolina Railhawks of the USL First Division.
Document 7: Danny Philliskirk: Born in Oldham, Greater Manchester, he began his career as a junior with Oldham Athletic before moving to Chelsea. Having failed to break into the Chelsea side he spent time on loan at Oxford United before signing for Sheffield United. Having been on the fringes of first team football he was eventually released to allow him to join Coventry City on a short term contract, before his return to Oldham. In January 2016, he signed for Blackpool on a two-and-a-half year deal with the club having an option to extend a further year.
Document 8: List of foreign Premier League goalscorers: Jozy Altidore -- Hull City, Sunderland DaMarcus Beasley -- Manchester City Carlos Bocanegra -- Fulham Geoff Cameron -- Stoke City Jay DeMerit -- Watford Clint Dempsey -- Fulham, Tottenham Hotspur (57) Landon Donovan -- Everton Brad Friedel -- Blackburn Rovers John Harkes -- Sheffield Wednesday Stuart Holden -- Bolton Wanderers Tim Howard -- Everton Cobi Jones -- Coventry City Jovan Kirovski -- Birmingham City Eric Lichaj -- Aston Villa Brian McBride -- Everton, Fulham Joe - Max Moore -- Everton Preki -- Everton Claudio Reyna -- Sunderland, Manchester City Jonathan Spector -- West Ham United Roy Wegerle -- Blackburn Rovers, Coventry City
Document 9: 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 10: Phan Xích Long: Phan Xích Long, also known as Hồng Long, born Phan Phát Sanh (1893–1916), was a 20th-century Vietnamese mystic and geomancer who claimed to be the Emperor of Vietnam. He attempted to exploit religion as a cover for his own political ambitions, having started his own ostensibly religious organisation. Claiming to be a descendant of Emperor Hàm Nghi, Long staged a ceremony to crown himself, before trying to seize power in 1913 by launching an armed uprising against the colonial rule of French Indochina. His supporters launched an attack on Saigon in March 1913, drinking potions that purportedly made them invisible and planting bombs at several locations. The insurrection against the French colonial administration failed when none of the bombs detonated and the supposedly invisible supporters were apprehended.
Document 11: Billy Phillips: Billy Phillips (born August 9, 1956 in Long Island, New York) is a former U.S. soccer goalkeeper who played three seasons in the North American Soccer League, six in the Major Indoor Soccer League and later coached the Dallas Sidekicks for two seasons.
Document 12: 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 13: 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 14: 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 15: 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.
ground_truth: North Canadian River
sub_queries: Phillip Long >> place of birth Answer: Oklahoma City
What river flows through Oklahoma City ? Answer: North Canadian River