Assertion: hydrocarbon | /r/HasProperty | part of the biosphere
Facets:
value: from the earliest days
type: TEMPORAL
value: from oil seeps
type: LOCATION
Source sentences:
text: We also note that although some hydrocarbons have been part of the biosphere from oil seeps from the earliest days, other hydrocarbons, such as 2,2,4-trimethylpentane, are made during catalytic processing of fossil fuel streams, and are not found in any significant concentrations in unrefined hydrocarbons.