( ( The ( planets ( Mercury ( , ( ( Venus and ) Earth ) ) ) ) ) ( ( can ( be ( seen ( to ( ( the right ) ( of ( the Sun ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP planets) (NNP Mercury) (, ,) (NNP Venus) (CC and) (NNP Earth)) (VP (MD can) (VP (VB be) (VP (VBN seen) (PP (TO to) (NP (NP (DT the) (NN right)) (PP (IN of) (NP (DT the) (NNP Sun)))))))) (. .)))
The planets Mercury, Venus and Earth can be seen to the right of the Sun.
(ROOT (S (NP (NNP Mercury)) (VP (VBZ is) (ADVP (RB always)) (ADJP (ADJP (JJR closer)) (PP (TO to) (NP (DT the) (NN sun)))) (SBAR (IN than) (S (NP (PRP it)) (VP (VBZ is) (PP (TO to) (NP (NN earth))))))) (. .)))
Mercury is always closer to the sun than it is to earth.