( ( ( THE ORBIT ) ( OF ( ( MERCURY Planets ) ( in ( the ( solar system ) ) ) ) ) ) ( ( ( ( move ( in ( ellipses ( around ( the sun ) ) ) ) ) , ) ( as ( predicted ( by ( Newtonian gravity ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT THE) (NN ORBIT)) (PP (IN OF) (NP (NP (NNP MERCURY) (NNP Planets)) (PP (IN in) (NP (DT the) (JJ solar) (NN system)))))) (VP (VBP move) (PP (IN in) (NP (NP (NNS ellipses)) (PP (IN around) (NP (DT the) (NN sun))))) (, ,) (SBAR (IN as) (S (VP (VBD predicted) (PP (IN by) (NP (NNP Newtonian) (NN gravity))))))) (. .)))
THE ORBIT OF MERCURY Planets in the solar system move in ellipses around the sun, as predicted by Newtonian gravity.
(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))))))))))))) (. .)))