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

<https://anchorfact.org/kb/history/great-wall-of-china>
  a schema:TechArticle ;
  schema:headline "Great Wall of China" ;
  schema:url <https://anchorfact.org/history/great-wall-of-china/> ;
  af:status "public" ;
  af:confidence "medium" ;
  af:confidenceScore "0.685" ;
  af:confidenceBasis "verified_sources" ;
  af:generationMethod "ai_structured" .

<https://anchorfact.org/kb/history/great-wall-of-china>
  schema:citation <https://www.britannica.com/topic/Great-Wall-of-China> ;
  af:sourceTier "B" .

<https://anchorfact.org/kb/history/great-wall-of-china>
  schema:citation <https://whc.unesco.org/en/list/438> ;
  af:sourceTier "B" .