Natural gas is a fossil fuel frequently found in the same or nearby underground deposits as crude oil.
(Natural gas; is; a fossil fuel frequently found in the same or nearby underground deposits as crude oil) (a fossil fuel; found; L:in the same or nearby underground deposits as crude oil; T:frequently)
Natural gas a fossil fuel
is found
a fossil fuel frequently found in the same or nearby underground deposits as crude oil
L:in the same or nearby underground deposits as crude oil T:frequently