Question: Where does the Merrimack River start in the state where the host city of the 1904 Summer Olympics is located?

full_context: Document 1: Mississippi River: The Mississippi River is the chief river of the second - largest drainage system on the North American continent, second only to the Hudson Bay drainage system. The stream is entirely within the United States (although its drainage basin reaches into Canada), its source is Lake Itasca in northern Minnesota and it flows generally south for 2,320 miles (3,730 km) to the Mississippi River Delta in the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 31 U.S. states and two Canadian provinces between the Rocky and Appalachian Mountains. The Mississippi ranks as the fourth - longest and fifteenth - largest river in the world by discharge. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana.
Document 2: Lake of the Ozarks: The Lake of the Ozarks is a large reservoir created by impounding the Osage River in the northern part of the Ozarks in central Missouri. Extents of three smaller tributaries to the Osage are included in the impoundment: the Niangua River, Grandglaize Creek, and Gravois Creek. The lake has a surface area of 54,000 acres (220 km) and 1,150 miles (1,850 km) of shoreline, and the main channel of the Osage Arm stretches 92 miles (148 km) from end to end. The total drainage area is over 14,000 square miles (36,000 km). The lake's serpentine shape has earned it the nickname ``The Magic Dragon '', which has in turn inspired the names of local institutions such as The Magic Dragon Street Meet.
Document 3: Mississippi: Mississippi ( (listen)) is a state located in the southeastern region of the United States. Mississippi is the 32nd largest and 34th-most populous of the 50 United States. Mississippi is bordered to north by Tennessee, to the east by Alabama, to the south by the Gulf of Mexico, to the southwest by Louisiana, and to the northwest by Arkansas.  Mississippi's western boundary is largely defined by the Mississippi River.  Jackson is both the state's capital and largest city.  Greater Jackson, with an estimated population of 580,166 in 2018, is the most populous metropolitan area in Mississippi and the 95th-most populous in the United States.
Document 4: Mississippi River: The Mississippi River is the chief river of the second - largest drainage system on the North American continent, second only to the Hudson Bay drainage system. Flowing entirely in the United States (although its drainage basin reaches into Canada), it rises in northern Minnesota and meanders slowly southwards for 2,320 miles (3,730 km) to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 31 U.S. states and 2 Canadian provinces between the Rocky and Appalachian Mountains. The Mississippi ranks as the fourth - longest and fifteenth - largest river in the world by discharge. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana.
Document 5: Geography of Missouri: Missouri river from its mouth at St. Louis to Columbia. This also corresponds to the southernmost extent of glaciation during the Pre-Illinoian Stage which destroyed the remnant plateau to the north but left the ancient landforms to the south unaltered. The Ozark boundary runs southwestward from there towards Joplin at the southeast corner of Kansas. The boundary between the Ozark and lowland regions runs southwest from Cape Girardeau on the Mississippi River to the Arkansas border just southwest of Poplar Bluff. Missouri borders eight other US States, more than any other state except Tennessee, which also borders eight states.
Document 6: Missouri River: The Missouri River is the longest river in North America. Rising in the Rocky Mountains of western Montana, the Missouri flows east and south for 2,341 miles (3,767 km) before entering the Mississippi River north of St. Louis, Missouri. The river takes drainage from a sparsely populated, semi-arid watershed of more than half a million square miles (1,300,000 km), which includes parts of ten U.S. states and two Canadian provinces. When combined with the lower Mississippi River, it forms the world's fourth longest river system.
Document 7: Alan Valentine: Alan Chester Valentine (February 23, 1901 – July 14, 1980) was an American academic who competed on the gold-medal winning American rugby union team in the 1924 Summer Olympics, was president of the University of Rochester, and served in the Truman Administration as a Marshall Plan official and as the first head of the Economic Stabilization Agency.
Document 8: St. Louis: St. Louis (/ seɪnt ˈluːɪs /) is an independent city and major U.S. port in the state of Missouri, built along the western bank of the Mississippi River, on the border with Illinois. The city had an estimated 2016 population of 311,404, and is the cultural and economic center of the Greater St. Louis area (home to 2,916,447 people), making it the largest metropolitan area in Missouri and the 19th - largest in the United States.
Document 9: Howard Valentine: He competed for the United States in the 1904 Summer Olympics held in St Louis, United States in the 800 metres where he won the silver medal and in the 1500 metres event where he finished seventh. He also competed for the New York Athletic Club team in the 4 mile team race against Chicago AA with teammates Arthur Newton, George Underwood, Paul Pilgrim and David Munson. They won the race and the gold medal.
Document 10: Meramec River: The Meramec River (/ ˈmɛrɪmæk /) is one of the longest free - flowing waterways in Missouri, draining 3,980 square miles (10,300 km) while wandering 218 miles (351 km) from headwaters near Salem to where it empties into the Mississippi River near St. Louis at Arnold and Oakville. The Meramec watershed covers six Missouri Ozark Highland counties -- Dent, Phelps, Crawford, Franklin, Jefferson, and St. Louis -- and portions of eight others -- Maries, Gasconade, Iron, Washington, Reynolds, St. Francois, Ste. Genevieve, and Texas. Between its source and its mouth, it falls 1,025 feet (312 m). Year - round navigability begins above Maramec Spring, just south of St. James. The Meramec's size increases at the confluence of the Dry Fork, and its navigability continues until the river enters the Mississippi at Arnold, Missouri.
Document 11: St. Charles, Missouri: St. Charles is a city in, and the county seat of, St. Charles County, Missouri, United States. The population was 65,794 at the 2010 census, making St. Charles the ninth - largest city in Missouri. It lies to the northwest, and is a suburb of St. Louis, Missouri on the Missouri River.
Document 12: 1904 Summer Olympics: The 1904 Summer Olympics, officially known as the Games of the III Olympiad, was an international multi-sport event which was celebrated in St. Louis, Missouri, in the United States from August 29 until September 3, 1904, as part of an extended sports program lasting from July 1 to November 23, 1904, at what is now known as Francis Field on the campus of Washington University in St. Louis. It was the first time that the Olympic Games were held outside Europe.
Document 13: Louis Wilkins: He competed for the United States in the 1904 Summer Olympics held in St Louis, United States in the pole vault where he won the bronze medal.
Document 14: East St. Louis, Illinois: East St. Louis, Illinois City East St. Louis Location of East St. Louis in St. Clair County, Illinois. Location of Illinois in the United States Coordinates: 38 ° 37 ′ N 90 ° 8 ′ W ﻿ / ﻿ 38.617 ° N 90.133 ° W ﻿ / 38.617; - 90.133 Coordinates: 38 ° 37 ′ N 90 ° 8 ′ W ﻿ / ﻿ 38.617 ° N 90.133 ° W ﻿ / 38.617; - 90.133 Country United States State Illinois County St. Clair Township East St. Louis (coterminous) Founded June 6, 1820 Incorporated February 16, 1865 Government Type Council - Manager Mayor Emeka Jackson - Hicks Area Total 14.28 sq mi (36.99 km) Land 13.90 sq mi (36.01 km) Water 0.38 sq mi (0.98 km) Population (2010) Total 27,006 Estimate (2016) 26,922 Density 1,936.42 / sq mi (747.64 / km) Time zone CST (UTC − 6) Summer (DST) CDT (UTC − 5) Area code (s) 618 FIPS code 17 - 163 - 22268 Website www.cesl.us
Document 15: 400 metres at the Olympics: Only two athletes have won the event twice: Marie - José Pérec became the first to defend the title in 1996, then Michael Johnson followed with victories in 1996 and 2000. No athlete has won more than three medals. Several medalists in the event have also had success in the 200 metres at the Olympics: Johnson, Perec, Szewińska and Valerie Brisco - Hooks have all won titles at both distances. Athletes chosen for the event almost always form part of their nation's team for the 4 × 400 metres relay at the Olympics.
ground_truth: near Salem
sub_queries: Athletics at the 1904 Summer Olympics >> located in the administrative territorial entity Answer: St Louis
where is St Louis located on the map Answer: Missouri
where does the merrimack river start in Missouri Answer: near Salem