( ( The planets ) ( ( orbit ( ( the sun ) ( in ( elliptical orbits ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS planets)) (VP (VBZ orbit) (NP (NP (DT the) (NN sun)) (PP (IN in) (NP (JJ elliptical) (NNS orbits))))) (. .)))
The planets orbit the sun in elliptical orbits.
(ROOT (S (NP (DT The) (NNS planets)) (VP (VB orbit) (PRT (RP around)) (NP (DT the) (NN sun))) (. .)))