claim: Charlotte, North Carolina was the second-largest economic center in the United States from 1995 to 2017.
evidence: The women 's 400 metres at the 1971 European Athletics Championships was held in Helsinki , Finland , at Helsinki Olympic Stadium on 10 , 11 , and 12 August 1971 .. 400 metres. 400 metres. 1971 European Athletics Championships. 1971 European Athletics Championships. Helsinki. Helsinki. Helsinki Olympic Stadium. Helsinki Olympic Stadium