Question: The city where the river that Merchants Bridge crosses over is the capital of which county?

Knowledge 1: Minneapolis, Kansas
Minneapolis is a city in and the county seat of Ottawa County, Kansas, United States. As of the 2010 census, the city population was 2,032. [SEP] Knowledge 2: I-35W Mississippi River bridge
The I-35W Mississippi River bridge (officially known as Bridge 9340) was an eight-lane, steel truss arch bridge that carried Interstate 35W across the Saint Anthony Falls of the Mississippi River in Minneapolis, Minnesota, United States. The bridge opened in 1967 and was Minnesota's third busiest, carrying 140,000 vehicles daily. It had a catastrophic failure during the evening rush hour on August 1, 2007, killing 13 people and injuring 145. The NTSB cited a design flaw as the likely cause of the collapse, noting that a too-thin gusset plate ripped along a line of rivets, and additional weight on the bridge at the time contributed to the catastrophic failure. [SEP] Knowledge 3: Merchants Bridge
The Merchants Bridge, officially the Merchants Memorial Mississippi Rail Bridge, is a rail bridge crossing the Mississippi River between St. Louis, Missouri, and Venice, Illinois. The bridge is owned by the Terminal Railroad Association of St. Louis. It opened in May 1889 and crossed the river north of the Eads Bridge.
Knowledge 1: Minneapolis, Kansas
Minneapolis is a city in and the county seat of Ottawa County, Kansas, United States. As of the 2010 census, the city population was 2,032. [SEP] Knowledge 2: I-35W Saint Anthony Falls Bridge
The I-35W Saint Anthony Falls Bridge crosses the Saint Anthony Falls of the Mississippi River in Minneapolis, Minnesota in the U.S., carrying north-south traffic on Interstate Highway 35W. The ten-lane bridge replaced the I-35W Mississippi River bridge, which collapsed on August 1, 2007. It was planned and is maintained by the Minnesota Department of Transportation (Mn/DOT). The planning, design, and construction processes were completed more quickly than normal because Interstate 35W is a critical artery for commuters and truck freight. The bridge opened September 18, 2008, well ahead of the original goal of December 24. [SEP] Knowledge 3: Merchants Bridge
The Merchants Bridge, officially the Merchants Memorial Mississippi Rail Bridge, is a rail bridge crossing the Mississippi River between St. Louis, Missouri, and Venice, Illinois. The bridge is owned by the Terminal Railroad Association of St. Louis. It opened in May 1889 and crossed the river north of the Eads Bridge.
Knowledge 1: DeSoto Bridge
After the collapse of the I-35W Mississippi River bridge in Minneapolis on August 1, 2007, Minnesota Governor Tim Pawlenty ordered the DeSoto Bridge and two other bridges in Minnesota to be inspected. The three bridges have a design similar to that of the former I-35W bridge. [SEP] Knowledge 2: I-35W Mississippi River bridge
The I-35W Mississippi River bridge (officially known as Bridge 9340) was an eight-lane, steel truss arch bridge that carried Interstate 35W across the Saint Anthony Falls of the Mississippi River in Minneapolis, Minnesota, United States. The bridge opened in 1967 and was Minnesota's third busiest, carrying 140,000 vehicles daily. It had a catastrophic failure during the evening rush hour on August 1, 2007, killing 13 people and injuring 145. The NTSB cited a design flaw as the likely cause of the collapse, noting that a too-thin gusset plate ripped along a line of rivets, and additional weight on the bridge at the time contributed to the catastrophic failure. [SEP] Knowledge 3: Minneapolis, Kansas
Minneapolis is a city in and the county seat of Ottawa County, Kansas, United States. As of the 2010 census, the city population was 2,032.

Answer: Ottawa County