( ( ( ( ( Mercury ( is ( ( the ( closest planet ) ) ( to ( the sun ) ) ) ) ) , ) and ) ( it ( is ( the ( ( eighth largest ) planet ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Mercury)) (VP (VBZ is) (NP (NP (DT the) (JJS closest) (NN planet)) (PP (TO to) (NP (DT the) (NN sun)))))) (, ,) (CC and) (S (NP (PRP it)) (VP (VBZ is) (NP (DT the) (ADJP (JJ eighth) (JJS largest)) (NN planet)))) (. .)))
Mercury is the closest planet to the sun, and it is the eighth largest planet.
(ROOT (S (NP (NNP Mercury)) (VP (VBZ is) (ADJP (ADJP (JJS closest)) (PP (TO to) (NP (PRP$ our) (NN sun))))) (. .)))