Assertion: liquid oxygen | /r/AtLocation | air
Facets:
value: naturally
type: MANNER
value: by fractional distillation
type: MANNER
Source sentences:
text: Liquid oxygen is obtained from the oxygen found naturally in air by fractional distillation in a cryogenic air separation plant.
text: Liquid oxygen is obtained from the oxygen found naturally in air by fractional distillation.
text: Liquid oxygen is obtained from the oxygen found naturally in air by fractional distillation.