Assertion: phosphorus | /r/Synonym | the devil’s element
Facets:
value: because of its tendency
type: CAUSE
value: sometimes
type: TEMPORAL
Source sentences:
text: Because phosphorus was used in nerve agents, poisons, and explosives, it is also known as the Devil’s element.
text: Because of its tendency to spontaneously combust when left alone in air, it is sometimes referred to as "the Devil's element".