( ( An ( ozone molecule ) ) ( ( consists ( of ( three ( oxygen atoms ) ) ) ) . ) )
(ROOT (S (NP (DT An) (NN ozone) (NN molecule)) (VP (VBZ consists) (PP (IN of) (NP (CD three) (NN oxygen) (NNS atoms)))) (. .)))
An ozone molecule consists 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))) (. .)))