{
  "default_cutoff": "strictly faster than 15:00 per mile",
  "distance_conversion": "1 mile = 1609.344 metres",
  "unit": "one published overall 5K/10K result row",
  "time_basis": "chip time where available; otherwise the published finish time",
  "primary_metric": "median minutes per mile among qualifying finishes",
  "quartile_method": "linear interpolation at (n-1)*p",
  "excluded": [
    "results at or slower than the pace cutoff",
    "explicitly labeled wheelchair results",
    "2020 mileage challenge",
    "2014 children\u2019s mile",
    "2023 virtual-only result set",
    "award/age-group repetitions"
  ],
  "notes": [
    "A pace cutoff is an operational definition, not a verified observation of gait.",
    "Wheelchair status is excluded only where the result explicitly labels it.",
    "Different entrants, courses, timing systems and conditions can affect comparisons; this does not rank course difficulty.",
    "Unknown/anonymous names remain included in pace statistics when a valid overall time is published.",
    "The small 2020 field is included as published; no race format is inferred."
  ]
}