They eat the plant itself, they eat animals that eat the plants, and they use the oxygen produced by plants.
(animals; eat; the plants) (they; use; the oxygen produced by plants) (the oxygen; produced; by plants) (they; eat; animals that eat the plants) Context(they eat,List([27, 35))):(They; eat; the plant)
they eat,List([27, 35))
animals they the oxygen they They
eat use produced eat eat
the plants
the oxygen produced by plants
by plants
animals that eat the plants
the plant