#chalk  a piece of chalk (or similar substance) used for writing on blackboards or other surfaces
  supertype:  #writing_implement__writingimplement  an implement that is used to write
  substance:  #chalk.calcite
  subtype:  #drawing_chalk__drawingchalk  colored chalks used by artists
  subtype:  #tailor's_chalk  chalk used by tailors to make temporary marks on cloth

No statement uses or specializes #chalk; click here to add one.