Oil for example is a fossil fuel,… it was formed millions of years ago as dead animals and plants died they formed a layer of dead stuff.
(it; died; ) (they; formed; a layer of dead stuff) (it; was formed; T:ago) Context(it was formed,List([37, 50))):(Oil for example; is; a fossil fuel)
it was formed,List([37, 50))
it they it Oil for example
died formed was formed is
a layer of dead stuff
T:ago
a fossil fuel