Assertion: gaseous ammonia | /r/HasProperty | isolated by joseph black
Facets:
value: by reacting sal ammoniac
type: MANNER
value: in 1756
type: TEMPORAL
Source sentences:
text: Gaseous ammonia was first isolated by Joseph Black in 1756 by reacting sal ammoniac (Ammonium Chloride) with calcined magnesia (Magnesium Oxide).