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