Coal is the carbon form of the fossilized remains of plant material that fell into swamps which disappeared 60-300 million years ago.
(Coal; is; the carbon form of the fossilized remains of plant material) (plant material; fell; into swamps) (swamps; disappeared; T:60-300 million years ago)
Coal plant material swamps
is fell disappeared
the carbon form of the fossilized remains of plant material
into swamps
T:60-300 million years ago