He said that water is the primordial substance, perhaps because it can be solid, liquid or gas, perhaps because it was anciently recognized as essential for life.
(He; said; that water is the primordial substance, perhaps because it can be solid, liquid or gas,) Context(He said,List([0, 7))):(water; is; the primordial substance)
He said,List([0, 7))
He water
said is
that water is the primordial substance, perhaps because it can be solid, liquid or gas,
the primordial substance