( ( On ( the ( Planetary Council ) ) ) ( , ( Hermes ( ( ( ( represents ( the planet ) ) ( ( Mercury , ) ( the ( communication center ) ) ) ) ( in ( the ( solar system ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN On) (NP (DT the) (NNP Planetary) (NNP Council))) (, ,) (NP (NNP Hermes)) (VP (VBZ represents) (NP (DT the) (NN planet)) (NP (NP (NNP Mercury)) (, ,) (NP (DT the) (NN communication) (NN center))) (PP (IN in) (NP (DT the) (JJ solar) (NN system)))) (. .)))
On the Planetary Council, Hermes represents the planet Mercury, the communication center in the solar system.
(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))))) (. .)))