( ( Ozone ( ( A gas ) ( consisting ( of ( molecules ( made ( of three ) ) ) ) ) ) ) ( ( oxygen atoms ) ( -LRB- ( ( O3 . ) -RRB- ) ) ) )
(ROOT (SINV (VP (VBZ Ozone) (NP (NP (DT A) (NN gas)) (VP (VBG consisting) (PP (IN of) (NP (NP (NNS molecules)) (VP (VBN made) (PP (IN of) (NP (CD three))))))))) (NP (NP (NN oxygen) (NNS atoms)) (PRN (-LRB- -LRB-) (NP (NNP O3) (. .)) (-RRB- -RRB-)))))
Ozone A gas consisting of molecules made of three oxygen atoms (O3.)
(ROOT (S (NP (CD Three) (NN oxygen) (NNS ions)) (VP (VBP make) (PRT (RP up)) (NP (DT an) (NN ozone) (NN molecule))) (. .)))