( ( Ozone molecules ) ( ( have ( ( three atoms ) ( of ( oxygen ( instead ( of ( the ( normal two ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Ozone) (NNS molecules)) (VP (VBP have) (NP (NP (CD three) (NNS atoms)) (PP (IN of) (NP (NP (NN oxygen)) (PP (RB instead) (IN of) (NP (DT the) (JJ normal) (CD two))))))) (. .)))
Ozone molecules have three atoms of oxygen instead of the normal two.
(ROOT (S (NP (CD Three) (NN oxygen) (NNS ions)) (VP (VBP make) (PRT (RP up)) (NP (DT an) (NN ozone) (NN molecule))) (. .)))