Assertion: ozone | /r/MadeOf | reaction
Facets:
value: in nature
type: LOCATION
value: between sunlight
type: LOCATION
value: between air pollutants
type: TRANSITIVE-OBJECT
Source sentences:
text: Ozone is a toxic gas which is formed by a reaction between air pollutants and sunlight.
text: In nature, ozone is formed by reactions involving ultraviolet rays, or by the electrical discharge of