( ( Mercury ( Radar ( Image Mercury ) ) ) ( ( is ( ( the ( closest planet ) ) ( to ( the Sun ) ) ) ) . ) )
(ROOT (S (NP (NNP Mercury) (NNP Radar) (NNP Image) (NNP Mercury)) (VP (VBZ is) (NP (NP (DT the) (JJS closest) (NN planet)) (PP (TO to) (NP (DT the) (NNP Sun))))) (. .)))
Mercury Radar Image Mercury is the closest planet to the Sun.
(ROOT (S (NP (NNP Mercury)) (VP (VBZ is) (ADJP (ADJP (JJS closest)) (PP (TO to) (NP (DT the) (NN sun))))) (. .)))