( ( Discovery ( of ( ( the Sun ) ( as ( ( the center ) ( of ( the ( solar system ) ) ) ) ) ) ) ) ( ( is ( attributed ( to Copernicus ) ) ) . ) )
(ROOT (S (NP (NP (NNP Discovery)) (PP (IN of) (NP (NP (DT the) (NNP Sun)) (PP (IN as) (NP (NP (DT the) (NN center)) (PP (IN of) (NP (DT the) (JJ solar) (NN system)))))))) (VP (VBZ is) (VP (VBN attributed) (PP (TO to) (NP (NNP Copernicus))))) (. .)))
Discovery of the Sun as the center of the solar system is attributed to Copernicus.
(ROOT (S (NP (DT The) (NN sun)) (VP (VBZ is) (NP (NP (DT the) (NN center)) (PP (IN of) (NP (PRP$ our) (JJ solar) (NN system))))) (. .)))
The sun is the center of our solar system.