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

<https://anchorfact.org/kb/science/black-holes>
  a schema:TechArticle ;
  schema:headline "Black Holes" ;
  schema:url <https://anchorfact.org/science/black-holes/> ;
  af:status "public" ;
  af:confidence "medium" ;
  af:confidenceScore "0.8" ;
  af:confidenceBasis "verified_sources" ;
  af:generationMethod "ai_structured" .

<https://anchorfact.org/kb/science/black-holes>
  schema:citation <https://science.nasa.gov/resource/first-image-of-a-black-hole/> ;
  af:sourceTier "A" .

<https://anchorfact.org/kb/science/black-holes>
  schema:citation <https://doi.org/10.1103/PhysRevLett.116.061102> ;
  af:sourceTier "S" .