Assertion: osmium | /r/HasProperty | identified in black residue
Facets:
value: at that time
type: TEMPORAL
Source sentences:
text: Osmium and iridium were identified in the black residue remaining after dissolving platinum ore with aqua regia, a mixture of 25% nitric acid (HNO 3 ) and 75% hydrochloric acid (HCl).
text: At that time, osmium and iridium were identified in the black residue remaining after dissolving platinum ore with water, a mixture of 25% nitric acid (HNO3) and 75% hydrochloric acid (HCl).