The oxygen demand created is the amount of oxygen needed by the organisms as they break down the milk.
(The oxygen demand; created; ) (The oxygen demand created; is; the amount of oxygen) (oxygen; needed; by the organisms; T:as they break down the milk) (they; break down; the milk)
The oxygen demand The oxygen demand created oxygen they
created is needed break down
the amount of oxygen
by the organisms T:as they break down the milk
the milk