( Ozone ( ( consists ( of ( ( three ( oxygen molecules ) ) ( combined together ) ) ) ) . ) )
(ROOT (S (NP (NN Ozone)) (VP (VBZ consists) (PP (IN of) (NP (NP (CD three) (NN oxygen) (NNS molecules)) (VP (VBN combined) (ADVP (RB together)))))) (. .)))
Ozone consists of three oxygen molecules combined together.
(ROOT (S (NP (CD Three) (NN oxygen) (NNS ions)) (VP (VBP make) (PRT (RP up)) (NP (DT an) (NN ozone) (NN molecule))) (. .)))