Assertion: hydrogen sulfide | /r/HasProperty | needed
Facets:
value: to exercise great care
type: PURPOSE
value: for living organisms
type: TRANSITIVE-OBJECT
Source sentences:
text: In small amounts, hydrogen sulfide is actually a vital molecule that is needed for living organisms to survive.
text: Hydrogen sulfide is as toxic as hydrogen cyanide; therefore, it is necessary to exercise great care in handling it.