( ( ( ( The ( Milky ( Way Galaxy ) ) ) ( ( ( The ( Solar ( System ( The ( Sun Mercury ) ) ) ) ) , ) ( the planet ) ) ) ( nearest ( to ( the sun ) ) ) ) . )
(ROOT (NP (NP (DT The) (NNP Milky) (NNP Way) (NNP Galaxy)) (NP (NP (DT The) (NNP Solar) (NNP System) (NNP The) (NNP Sun) (NNP Mercury)) (, ,) (NP (DT the) (NN planet))) (NP (NP (JJS nearest)) (PP (TO to) (NP (DT the) (NN sun)))) (. .)))
The Milky Way Galaxy The Solar System The Sun Mercury, the planet nearest to the sun.
(ROOT (S (NP (NNP Mercury)) (VP (VBZ is) (NP (NP (DT the) (JJS smallest) (NN planet)) (PP (IN in) (NP (PRP$ our) (JJ solar) (NN system))))) (. .)))