Assertion: methane | /r/AtLocation | natural gas
Facets:
value: usually
type: DEGREE
Source sentences:
text: Methane can be produced by many chemical methods, but usually is found in natural gas and is obtained by fractional distillation, after it is become liquid.
text: The LFG comprises of almost 50% methane, which is the same gas found in natural gas.
text: Methane (CH4) is the same energy-rich compound found in natural gas.