( ( Compare ( ( the sizes ) ( of ( ( ( ( ( ( the Sun ) , ) ( the Moon ) ) , ) and ) ( the Earth ) ) ) ) ) . )
(ROOT (S (VP (VB Compare) (NP (NP (DT the) (NNS sizes)) (PP (IN of) (NP (NP (DT the) (NNP Sun)) (, ,) (NP (DT the) (NN Moon)) (, ,) (CC and) (NP (DT the) (NN Earth)))))) (. .)))
Compare the sizes of the Sun, the Moon, and the Earth.
(ROOT (S (NP (NP (DT The) (NN sun)) (CC and) (NP (DT the) (NN moon))) (VP (VBP appear) (S (VP (TO to) (VP (VB be) (PP (IN about) (NP (NP (DT the) (JJ same) (NN size)) (PP (IN in) (NP (DT the) (NN sky))))) (SBAR (IN because) (S (NP (DT the) (NN moon)) (VP (VP (VBZ is) (ADJP (JJR smaller)) (PP (IN in) (NP (NN diameter)))) (CC and) (VP (VBZ is) (ADJP (ADJP (JJR closer)) (PP (TO to) (NP (NN earth)))) (PP (IN than) (NP (DT the) (NN sun))))))))))) (. .)))