( Ozone ( ( is ( ( a molecule ) ( made ( of ( three ( oxygen atoms ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Ozone)) (VP (VBZ is) (NP (NP (DT a) (NN molecule)) (VP (VBN made) (PP (IN of) (NP (CD three) (NN oxygen) (NNS atoms)))))) (. .)))
Ozone is a molecule made 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))) (. .)))