Assertion: hydrogen sulfide | /r/AtLocation | volcanic gases
Facets:
value: naturally
type: MANNER
Source sentences:
text: Hydrogen sulfide (H 2 S) occurs naturally in crude petroleum, natural gas, volcanic gases, and hot springs.
text: Hydrogen Sulfide is flammable, naturally occurring in crude petroleum, natural gas, volcanic gas, and hot springs.
text: Hydrogen sulfide occurs naturally in crude petroleum, natural gas, volcanic gases, and hot springs.
text: Hydrogen sulfide occurs naturally in crude petroleum, natural gas, volcanic gases, and hot springs.