According to local NBC-affiliated TV station in Colorado, Arapahoe High School has 2,229 students.
It is in Centennial, a surburb of Denver.
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Nearly 38,000 runners will hope to complete Sunday's London Marathon making it the biggest event in its 35-year history.
Rain across central Britain with longer, intense downpours with thunder in places this evening. A lucky few will stay sunny and dry.
Planning on going to the London Marathon tomorrow? Read our handy guide first!