Assertion: compound's carbon | /r/HasProperty | converted to petroleum
Facets:
value: at the bottom of the ocean
type: LOCATION
value: beneath layers of rock
type: LOCATION
Source sentences:
text: When creatures die and are buried in such a way that they cannot be reached by decomposers—for instance, at the bottom of the ocean, or beneath layers of rock—the carbon in their bodies is eventually converted to fossil fuels, including petroleum, natural gas, and coal.