( ( ( ( ( The Sun ) , ) ( which ( is ( at ( ( the center ) ( of ( the ( solar system ) ) ) ) ) ) ) ) , ) ( ( is ( ( 100 times ) ( bigger ( than ( the Earth ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNP Sun)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (PP (IN at) (NP (NP (DT the) (NN center)) (PP (IN of) (NP (DT the) (JJ solar) (NN system)))))))) (, ,)) (VP (VBZ is) (ADJP (NP (CD 100) (NNS times)) (JJR bigger) (PP (IN than) (NP (DT the) (NN Earth))))) (. .)))
The Sun, which is at the center of the solar system, is 100 times bigger than the Earth.
(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.