( ( ozone ( -LRB- ( O3 -RRB- ) ) ) ( ( Found ( in ( ( two layers ) ( of ( ( ( ( ( the atmosphere ) , ) ( the stratosphere ) ) and ) ( the troposphere ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NN ozone)) (PRN (-LRB- -LRB-) (NP (NNP O3)) (-RRB- -RRB-))) (VP (VBD Found) (PP (IN in) (NP (NP (CD two) (NNS layers)) (PP (IN of) (NP (NP (DT the) (NN atmosphere)) (, ,) (NP (DT the) (NN stratosphere)) (CC and) (NP (DT the) (NNP troposphere))))))) (. .)))
ozone (O3) Found in two layers of the atmosphere, the stratosphere and the troposphere.
(ROOT (S (NP (DT The) (NN stratosphere)) (VP (VBZ is) (NP (NP (DT the) (NN layer)) (PP (IN above) (NP (DT the) (NNP troposphere))))) (. .)))