Assertion: argon | /r/HasProperty | obtained
Facets:
value: by separating it
type: MANNER
value: from air
type: OTHER
Source sentences:
text: Neon, argon, krypton, and xenon are obtained from air using the methods of liquefaction of gases, to convert elements to a liquid state, and fractional distillation, to separate mixtures into component parts.
text: Argon can be obtained by separating it from air through distillation of liquid air.