Assertion: pottery's colour | /r/HasProperty | achieved
Facets:
value: by firing in an atmosphere
type: MANNER
value: by firing the clay
type: MANNER
Source sentences:
text: The green colour is achieved by firing the clay in an oxygen-reducing kiln with a glaze containing a low percentage of iron oxide (cheolhwa).
text: The colour was achieved by firing in an atmosphere charged with carbon monoxide instead of oxygen.