Assertion: natural gas | /r/MadeOf | ethane
Facets:
value: mostly
type: DEGREE
Source sentences:
text: Natural gas is a colorless gaseous fossil fuel consisting of mostly methane and ethane—composed of hydrogen and carbon—and is also known as hydrocarbon.
text: Natural gas consists mostly of methane and hydrocarbons or ethane.
text: Crude oil or petroleum consists of hydrocarbons and other organic compounds while natural gas consists mostly of methane and hydrocarbons or ethane.