( Mars ( ( ( ( is ( ( ( ( the ( fourth planet ) ) ( from ( the Sun ) ) ) and ) ( ( the ( second ( smallest planet ) ) ) ( in ( the ( Solar System ) ) ) ) ) ) , ) ( after Mercury ) ) . ) )
(ROOT (S (NP (NNP Mars)) (VP (VBZ is) (NP (NP (NP (DT the) (JJ fourth) (NN planet)) (PP (IN from) (NP (DT the) (NNP Sun)))) (CC and) (NP (NP (DT the) (JJ second) (JJS smallest) (NN planet)) (PP (IN in) (NP (DT the) (NNP Solar) (NNP System))))) (, ,) (PP (IN after) (NP (NNP Mercury)))) (. .)))
Mars is the fourth planet from the Sun and the second smallest planet in the Solar System, after Mercury.
(ROOT (S (NP (NNP Mars)) (VP (VBZ is) (NP (NP (DT the) (JJ fourth) (NN planet)) (PP (IN from) (NP (DT the) (NN sun))))) (. .)))