Assertion: osmium | /r/PartOf | the platinum family
Facets:
Source sentences:
text: Osmium is a Nobel metal and belongs to the platinum family.
text: Osmium belongs to the platinum family.
text: Osmium is a hard, brittle, blue-gray transition metal belonging to the platinum family and is the densest natural element.
text: Osmium is a hard, brittle, blue-gray transition metal belonging to the platinum family and is the densest natural element.