Assertion: krypton | /r/HasProperty | extracted
Facets:
value: via liquid air
type: MANNER
value: in total
type: OTHER
Source sentences:
text: Krypton might be one of the rarest gases in the atmosphere, but in total there are more than 15 billion tonnes of this metal circulating in the planet, of which only about 8 tonnes a year are extracted, via liquid air.