Question: What city in Minnesota has an eleven day festival that was impacted adversely by the collapse of a bridge over the Mississippi River in 2007?
Sentence (from "I-35W Mississippi River bridge"): 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 asserted that additional weight on the bridge at the time of the collapse contributed to the catastrophic failure.
Relevant evidence: No