( Gravity ( ( ( ( ( holds us ) ( to ( the earth ) ) ) and ) ( ( holds ( ( the earth ) ( in orbit ) ) ) ( about ( the sun ) ) ) ) . ) )
(ROOT (S (NP (NNP Gravity)) (VP (VP (VBZ holds) (NP (PRP us)) (PP (TO to) (NP (DT the) (NN earth)))) (CC and) (VP (VBZ holds) (NP (NP (DT the) (NN earth)) (PP (IN in) (NP (NN orbit)))) (PP (IN about) (NP (DT the) (NN sun))))) (. .)))
Gravity holds us to the earth and holds the earth in orbit about the sun.
(ROOT (S (NP (NNP Gravity)) (VP (VBZ attracts) (NP (DT the) (NN earth)) (PP (TO to) (NP (DT the) (NN sun)))) (. .)))