today's London Marathon
... that today's London Marathon is expected to have 50,000 runners, and another 50,000 virtual competitors?
... that <b id="mwBvU"><a href="./2021_London_Marathon" id="mwBvY" rel="mw:WikiLink" title="2021 London Marathon">today's London Marathon</a></b> is expected to have 50,000 runners, and another 50,000 virtual competitors?