Assertion: nitrogen dioxide's gas | /r/HasProperty | identifiable
Facets:
value: by distinctive, sharp odor
type: CAUSE
value: easily
type: MANNER
value: by its reddish-brown color
type: CAUSE
Source sentences:
text: Nitrogen dioxide is one of the most prominent and dangerous air pollutants, and this toxic gas is easily identifiable by its reddish-brown color and distinctive, sharp odor.