Assertion: ozone | /r/HasProperty | produced as gas
Facets:
value: from oxygen
type: OTHER
value: always
type: TEMPORAL
value: from air
type: TRANSITIVE-OBJECT
Source sentences:
text: Ozone produced commercially for oxidation reactions always is produced as a gas, from air at concentrations between 1.0 and 2.0% by weight, or from oxygen at concentrations greater than 2% and up to 8% (or greater) by weight.