Assertion: gold | /r/HasProperty | heated in furnace
Facets:
value: with silica
type: OTHER
value: with ash
type: OTHER
value: with soda
type: OTHER
value: with borax
type: OTHER
Source sentences:
text: The gold is heated in a furnace with silica, borax and soda ash which soaks up most of the impurities, forming a slag which rises to the top of the furnace while the heavier gold settles to the bottom.