Assertion: methane | /r/AtLocation | nature
Facets:
value: widely
type: DEGREE
value: with deposits of petroleum
type: OTHER
Source sentences:
text: Methane, also known as methyl hydride or marsh gas, is a gas extensively found in nature, which is very used as combustible.
text: Methane is widely found in nature.
text: In nature, methane is found in underground reservoirs often with deposits of petroleum.