Assertion: crude oil | /r/HasProperty | natural gas
Facets:
value: as a technical term
type: MANNER
Source sentences:
text: The term is often restricted to the liquid form, commonly called crude oil , but, as a technical term, petroleum also includes natural gas and the viscous or solid form known as bitumen , which is found in tar sands .
text: As a technical term, petroleum also includes natural gas, a naturally occurring gas with a similar chemistry to crude oil that also occurs in subsurface deposits.