Assertion: hydrocarbon | /r/HasProperty | formed
Facets:
Source sentences:
text: They are formed from the compression of animal and plant remains over long periods of time, and are pulled from porous rocks such as sandstone, limestone, and shale, where they pool and concentrate.
text: Hydrocarbons are formed from the remains of marine animals and plants that lived in shallow inland seas, died, and drifted to the bottom.