M-231
... that to celebrate the opening of the new state highway M-231, the Michigan Department of Transportation held an "M23.1K Run" with 231 competitors?
... that to celebrate the opening of the new state highway <b id="mwAgE"><a href="./M-231_(Michigan_highway)" id="mwAgI" rel="mw:WikiLink" title="M-231 (Michigan highway)">M-231</a></b>, the <a href="./Michigan_Department_of_Transportation" id="mwAgM" rel="mw:WikiLink" title="Michigan Department of Transportation">Michigan Department of Transportation</a> held an "M23.1K Run" with 231 competitors?