Question: Which county contains the birth city of Thomas Birkett?

full_context: Document 1: Arlington, Illinois: Arlington is a village in Bureau County, Illinois, United States. The population was 193 at the 2010 census. It is part of the Ottawa–Streator Micropolitan Statistical Area, located east of the Quad Cities, north of Peoria and Galesburg, west of LaSalle and Peru, and southwest of Rockford and Chicago.
Document 2: Shippingsport Bridge: Shippingsport Bridge has been the name of three similarly-located bridges over the Illinois River in LaSalle Township, LaSalle County, Illinois: an 1872 swing span bridge, a 1929 vertical-lift bridge nearby, and a 2003 bridge in the same location as the 1929 bridge. The third bridge still exists and carries Illinois Route 351 (IL 351).
Document 3: Oklahoma: Two inland ports on rivers serve Oklahoma: the Port of Muskogee and the Tulsa Port of Catoosa. The only port handling international cargo in the state, the Tulsa Port of Catoosa is the most inland ocean-going port in the nation and ships over two million tons of cargo each year. Both ports are located on the McClellan-Kerr Arkansas River Navigation System, which connects barge traffic from Tulsa and Muskogee to the Mississippi River via the Verdigris and Arkansas rivers, contributing to one of the busiest waterways in the world.
Document 4: J. E. Stanley Lewis: He was born in Ottawa in 1888 to Edward and Isabella Lewis. He owned and operated an electrical store in the city. He was first elected to City Council as an alderman in 1930. It was during Lewis' term as mayor, in early September 1946, that 25 veterans of World War II and their families took over the abandoned Kildare Barracks at 323 Chapel St. to protest the lack of housing.
Document 5: Ottawa, Kansas: Ottawa is a city in, and the county seat of, Franklin County, Kansas, United States. It is located on both banks of the Marais des Cygnes River near the center of Franklin County. As of the 2010 census, the city population was 12,649.
Document 6: Alan Tonks: Tonks is the son of the late Chris Alexander Tonks (1917-2006), who was a reeve (1957-1960) , deputy reeve, Board of Control member and alderman in what was first the Township and then the Borough of York (1969-1988) in Metropolitan Toronto. After graduating from York Memorial Collegiate Institute Tonk's father ran Tonks Hardware and Electric at 452 Rogers Road founded by his grandfather. Alan Tonks attended York University where he earned a Master's degree in political economy and the University of Toronto where he received a master's degree in education. He spent time working for a Canadian aid agency in Jamaica before becoming a junior high teacher for the Scarborough Board of Education for several years.
Document 7: Thomas Birkett: Birkett was born in Bytown (as Ottawa was known then) in 1844, the son of Miles Birkett and Elizabeth Wren, who came to Upper Canada from England. At the age of 13, he became an apprentice to a local hardware store owner. In 1866, he opened his own hardware store. Birkett served on the school board from 1867 to 1871 and was an alderman on Ottawa City Council from 1873 to 1878. During his term as mayor, electric streetcars were introduced in Ottawa. In 1871, he married Mary Gallagher; after her death, he married Henrietta Gallagher, her stepsister, in 1904. Birkett also served as president of the advisory board of the Dominion Building and Loan Association at Ottawa. He was also a long-time member of the Masonic Order. In 1900, he was named a trustee for the Ottawa Collegiate Institute. He died in Ottawa of pneumonia in 1920. He is buried at Beechwood Cemetery.
Document 8: Francis Theodore Frost: Born in Smiths Falls, Canada West, the son of Ebenezer Frost and Caroline Harwood, he was educated in Smiths Falls, Coventry, Vermont and Potsdam, New York. Frost manufactured farm implements in Smith Falls. He was reeve of Smiths Falls from 1876 to 1883 and became the town's first mayor in 1883. Frost also served as warden for Lanark County. In 1868, he married Maria E. Powell.
Document 9: Rock River (Mississippi River tributary): The river begins with three separate branches which flow into the Horicon Marsh. The northermost branch, the West Branch, begins just to the west of the village of Brandon in Fond du Lac County, Wisconsin and flows east and then south to Horicon Marsh. The South Branch rises north of Fox Lake in Dodge County and flows east through Waupun to the marsh. The East Branch rises southeast of Allenton in Washington County just west of the Niagara Escarpment, and flows north and west through Theresa to the marsh. Leaving the marsh, it meanders southward to the Illinois border ending about 300 miles later at the Mississippi River at the Quad Cities in Illinois and Iowa. During its course it passes through Watertown, collects the Crawfish River in Jefferson, and receives the Bark River at Fort Atkinson. In northern Rock County it receives the Yahara River, and flows southward through Janesville and Beloit into northern Illinois, where it receives the Pecatonica River 5 miles (8 km) south of the state line.
Document 10: William Thompson (Upper Canada): He was born in New Brunswick in 1786, the son of a United Empire Loyalist, and came to Grantham Township with his family in 1809. He served as captain in the local militia during the War of 1812 and fought at the Battle of Queenston Heights. He was taking prisoner by the Americans while on a scouting expedition. When he returned, his father had died and their property damaged; he settled in Toronto Township. He built a sawmill with his brother in 1817. During the Upper Canada Rebellion, he served as colonel in the York militia and became lieutenant colonel in 1846. In 1824, he was elected to the 9th Parliament of Upper Canada for York and Simcoe. He was a conservative member, with close ties to members of the so-called "Family Compact". After several attempts at reelection, he retired to local politics. In 1844, he became a member of the township council and was reeve in 1851.
Document 11: Ottawa, Illinois: Ottawa is a city located at the confluence of the navigable Illinois River and Fox River in LaSalle County, Illinois, United States. The Illinois River is a conduit for river barges and connects Lake Michigan at Chicago, to the Mississippi River, and North America's 25,000 mile river system. The population estimate was 18,562 as of 2013. It is the county seat of LaSalle County and it is part of the Ottawa-Peru, IL Micropolitan Statistical Area.
Document 12: Geography of Illinois: Illinois is in the midwestern United States. Surrounding states are Wisconsin to the north, Iowa and Missouri to the west, Kentucky to the south, and Indiana to the east. Illinois also borders Michigan, but only via a northeastern water boundary in Lake Michigan. Nearly the entire western boundary is the Mississippi River, except for a few areas where the river has changed course. Illinois' southeastern and southern boundary is along the Wabash River and the Ohio River. Whereas, its northern boundary and much of its eastern boundary are straight survey (longitudinal and latitudinal) lines. Illinois has a maximum north - south distance of 390 miles (630 km) and 210 miles (340 km) east - west. Its total area is 57,918 square miles (150,010 km).
Document 13: George Hope Bertram: Born in Fenton Barns, Scotland to Hugh Bertram and Isabella Mack, Bertram emigrated to join his brother John in Canada in 1865. After opening a hardware store in Lindsay, Ontario, he moved to Toronto in 1876. A prominent businessman, Bertram was elected to federal parliament as a member of the House of Commons of Canada for Toronto Centre in an 1897 by-election. Bertram's daughter, Christine Mabel married William Henry Moore, a writer and lawyer who also became a Member of the Canadian House of Commons from Ontario. A Liberal, he died in office in 1900 and is buried in Mount Pleasant Cemetery, Toronto.
Document 14: William Barber (Ontario politician): His family came to Canada from County Antrim in Ulster, Ireland in 1822. The four Barber brothers built a woollen mill, foundry and sawmill in Georgetown, Ontario. In 1854, they built a paper mill on the Credit River near Streetsville, Ontario. In 1888, his nephew, John Roaf Barber, upgraded the mill to use hydroelectricity power, one of the early industrial applications of electricity in Canada.
Document 15: Ottawa: Ottawa (/ ˈɒtəwə / (listen), / - wɑː /; French pronunciation: ​ (ɔtawa)) is the capital city of Canada. It stands on the south bank of the Ottawa River in the eastern portion of southern Ontario. Ottawa borders Gatineau, Quebec; the two form the core of the Ottawa -- Gatineau census metropolitan area (CMA) and the National Capital Region (NCR). As of 2016, Ottawa had a city population of 934,243 and a metropolitan population of 1,323,783 making it the fourth - largest city and the fifth - largest CMA in Canada.
ground_truth: LaSalle County
sub_queries: Thomas Birkett >> place of death Answer: Ottawa
Ottawa >> located in the administrative territorial entity Answer: LaSalle County