Assertion: ozone | /r/ObjectUse | used in late 1800s
Facets:
value: to control odors
type: PURPOSE
value: commercially
type: MANNER
Source sentences:
text: Ozone was first used commercially in France in the late 1800s in a slaughterhouse to control odors.
text: Ozone was first used in water treatment in the late 1800s and ozone is more widely used in Europe and Asia than the United States.