( ( Each ( ozone molecule ) ) ( ( is ( ( made up ) ( of ( three ( oxygen atoms ) ) ) ) ) . ) )
(ROOT (S (NP (DT Each) (NN ozone) (NN molecule)) (VP (VBZ is) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (CD three) (NN oxygen) (NNS atoms))))) (. .)))
Each ozone molecule is made up of three oxygen atoms.
(ROOT (S (NP (CD Three) (NN oxygen) (NNS ions)) (VP (VBP make) (PRT (RP up)) (NP (DT an) (NN ozone) (NN molecule))) (. .)))