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and men are compared within the same race edition and the same whole finish minute between 2:30 and 6:00; each edition-minute cell contributes the smaller of its two group sizes, so neither group dominates. The 20–40 km block change compares the 20–40 km block with the 0–20 km block, not measured half-marathon splits. Exact ages come only from editions whose age field holds at least 30 distinct values with fewer than 40% multiples of five; sources that record age-group floors are left out. Intervals resample whole editions."}