( Fog ( ( can ( be ( ( considered ( as ( ( a ( low ( stratus cloud ) ) ) ( in contact ) ) ) ) ( with ( the ground ) ) ) ) ) . ) )
(ROOT (S (NP (NN Fog)) (VP (MD can) (VP (VB be) (VP (VBN considered) (PP (IN as) (NP (NP (DT a) (JJ low) (NNS stratus) (NN cloud)) (PP (IN in) (NP (NN contact))))) (PP (IN with) (NP (DT the) (NN ground)))))) (. .)))
Fog can be considered as a low stratus cloud in contact with the ground.
(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)))))) (. .)))