( ( ( Key Concepts ) ( The ( solar system ) ) ) ( ( ( is large ) ( when ( compared ( with ( ( the size ) ( of ( ( ( the sun ) and ) planets ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Key) (NNP Concepts)) (NP (DT The) (JJ solar) (NN system))) (VP (VBZ is) (ADJP (JJ large)) (SBAR (WHADVP (WRB when)) (S (VP (VBN compared) (PP (IN with) (NP (NP (DT the) (NN size)) (PP (IN of) (NP (NP (DT the) (NN sun)) (CC and) (NP (NNS planets)))))))))) (. .)))
Key Concepts The solar system is large when compared with the size of the sun and planets.
(ROOT (S (NP (DT The) (NN sun)) (VP (VBZ is) (NP (NP (DT the) (JJS largest) (NN body)) (PP (IN in) (NP (DT the) (JJ solar) (NN system))))) (. .)))