@prefix schema: <https://schema.org/> .
@prefix af: <https://anchorfact.org/ns#> .

<https://anchorfact.org/kb/sports/marathon-running>
  a schema:TechArticle ;
  schema:headline "Marathon Running" ;
  schema:url <https://anchorfact.org/sports/marathon-running/> ;
  af:status "public" ;
  af:confidence "low" ;
  af:confidenceScore "0.89" ;
  af:confidenceBasis "verified_sources" ;
  af:generationMethod "ai_assisted" .

<https://anchorfact.org/kb/sports/marathon-running>
  schema:citation <https://www.britannica.com/sports/marathon-race> ;
  af:sourceTier "B" .

<https://anchorfact.org/kb/sports/marathon-running>
  schema:citation <https://doi.org/10.1249/MSS.0000000000000852> ;
  af:sourceTier "S" .

<https://anchorfact.org/kb/sports/marathon-running>
  schema:citation <https://worldathletics.org/records/by-discipline/road-running/marathon/outdoor/men> ;
  af:sourceTier "S" .