( Ozone ( ( is ( ( ( ( ( a molecule ) ( made ( of ( three ( oxygen atoms ) ) ) ) ) , ) ( rather than ) ) ( ( the ( two ( oxygen atoms ) ) ) ( in ( a ( normal ( oxygen molecule ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Ozone)) (VP (VBZ is) (NP (NP (NP (DT a) (NN molecule)) (VP (VBN made) (PP (IN of) (NP (CD three) (NN oxygen) (NNS atoms))))) (, ,) (CONJP (RB rather) (IN than)) (NP (NP (DT the) (CD two) (NN oxygen) (NNS atoms)) (PP (IN in) (NP (DT a) (JJ normal) (NN oxygen) (NN molecule)))))) (. .)))
Ozone is a molecule made of three oxygen atoms, rather than the two oxygen atoms in a normal oxygen molecule.
(ROOT (S (NP (CD Three) (NN oxygen) (NNS ions)) (VP (VBP make) (PRT (RP up)) (NP (DT an) (NN ozone) (NN molecule))) (. .)))