( Mercury ( ( ( ( is ( ( the ( ( smallest and ) closest ) ) ( to ( ( the Sun ) ( of ( ( the ( eight planets ) ) ( in ( the ( Solar System ) ) ) ) ) ) ) ) ) , ) ( with ( ( an ( orbital period ) ) ( of ( ( about 88 ) ( Earth days ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Mercury)) (VP (VBZ is) (NP (NP (DT the) (JJS smallest) (CC and) (JJS closest)) (PP (TO to) (NP (NP (DT the) (NNP Sun)) (PP (IN of) (NP (NP (DT the) (CD eight) (NNS planets)) (PP (IN in) (NP (DT the) (NNP Solar) (NNP System)))))))) (, ,) (PP (IN with) (NP (NP (DT an) (JJ orbital) (NN period)) (PP (IN of) (NP (QP (RB about) (CD 88)) (NNP Earth) (NNS days)))))) (. .)))
Mercury is the smallest and closest to the Sun of the eight planets in the Solar System, with an orbital period of about 88 Earth days.
(ROOT (S (NP (NNP Mercury)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (NP (DT the) (JJS smallest) (NN planet)) (PP (IN in) (NP (NP (PRP$ our) (JJ solar) (NN system)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADVP (RB also)) (NP (NP (JJS nearest)) (PP (TO to) (NP (DT the) (NN sun))))))))))))) (. .)))