( ( ( All ( the planets ) ) ( in ( ( the ( solar system ) ) ( except ( ( Mercury and ) Venus ) ) ) ) ) ( ( have ( natural satellites ) ) . ) )
(ROOT (S (NP (NP (PDT All) (DT the) (NNS planets)) (PP (IN in) (NP (NP (DT the) (JJ solar) (NN system)) (PP (IN except) (NP (NNP Mercury) (CC and) (NNP Venus)))))) (VP (VBP have) (NP (JJ natural) (NNS satellites))) (. .)))
All the planets in the solar system except Mercury and Venus have natural satellites.
(ROOT (S (NP (NNP Mercury)) (VP (VBZ is) (NP (NP (DT the) (JJS smallest) (NN planet)) (PP (IN in) (NP (PRP$ our) (JJ solar) (NN system))))) (. .)))