Assertion: lignite | /r/HasProperty | dark brown
Facets:
value: in colour
type: OTHER
value: to black combustible mineral
type: TRANSITIVE-OBJECT
Source sentences:
text: Lignite is a dark brown to black combustible mineral formed over millions of years by the partial decomposition of plant material subject to increased pressure and temperature in an airless atmosphere.
text: Lignite is dark brown in colour