( ( Stratus clouds ) ( ( are ( ( the ( layered clouds ) ) ( occurring ( in ( ( the ( lower part ) ) ( of ( the troposphere ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Stratus) (NNS clouds)) (VP (VBP are) (NP (NP (DT the) (JJ layered) (NNS clouds)) (VP (VBG occurring) (PP (IN in) (NP (NP (DT the) (JJR lower) (NN part)) (PP (IN of) (NP (DT the) (NNP troposphere)))))))) (. .)))
Stratus clouds are the layered clouds occurring in the lower part of the troposphere.
(ROOT (S (NP (NNP Stratus) (NNS clouds)) (VP (VBP occur) (PP (IN in) (NP (NP (DT the) (NN low)) (PP (IN of) (NP (DT the) (NNP troposphere)))))) (. .)))