Assertion: hydrogen sulfide | /r/AtLocation | crude oil
Facets:
value: naturally
type: MANNER
Source sentences:
text: For example, hydrogen sulfide occurs naturally in crude oil, natural gas, and in hot springs.
text: Hydrogen sulfide is most often present in high iron bearing water and low or acidic pH waters, but also occurs naturally in crude oil, natural gas, and geologically active areas like volcanoes and hot springs.
text: Hydrogen sulfide (H 2 S) naturally occurs in crude oil.