Assertion: lignite | /r/HasProperty | admixed with inorganic material
Facets:
value: prior to
type: TEMPORAL
Source sentences:
text: In still another aspect, this invention relates to a method for burning coal or lignite, which contains sulfur, with reduced emissions of sulfur containing air contaminants wherein the coal or lignite is admixed with an inorganic material prior to burning the coal or lignite.