Oxygen is the only gas we really need to breathe in order to stay alive.
(Oxygen; is; the only gas we really need to breathe in order) (we; really need; to breathe in order) Context(we really need,List([23, 37))):(the only gas; to breathe; in order)
we really need,List([23, 37))
Oxygen we the only gas
is really need to breathe
the only gas we really need to breathe in order
to breathe in order
in order