( Above ( ( the troposphere ) ( ( is ( the stratosphere ) ) . ) ) )
(ROOT (S (ADVP (IN Above)) (NP (DT the) (NNP troposphere)) (VP (VBZ is) (NP (DT the) (NN stratosphere))) (. .)))
Above the troposphere is the stratosphere.
(ROOT (S (NP (DT The) (NN stratosphere)) (VP (VBZ is) (NP (NP (DT the) (NN layer)) (PP (IN above) (NP (DT the) (NNP troposphere))))) (. .)))