Water is the only substance found naturally on earth in 3 forms -- solid, liquid, and gas.
(Water; is; the only substance found naturally on earth in 3 forms -- solid, liquid, and gas) (the only substance; found naturally; L:on earth; L:in 3 forms)
Water the only substance
is found naturally
the only substance found naturally on earth in 3 forms -- solid, liquid, and gas
L:on earth L:in 3 forms