( ( Our Sun ) ( ( ( takes ( ( about ( 250 million ) ) years ) ) ( to ( complete ( one orbit ) ) ) ) . ) )
(ROOT (S (NP (NNP Our) (NNP Sun)) (VP (VBZ takes) (NP (QP (RB about) (CD 250) (CD million)) (NNS years)) (S (VP (TO to) (VP (VB complete) (NP (CD one) (NN orbit)))))) (. .)))
Our Sun takes about 250 million years to complete one orbit.
(ROOT (S (NP (PRP It)) (VP (VBZ takes) (PP (IN about) (NP (NP (CD one) (NN year)) (PP (IN for) (NP (NN earth))))) (S (VP (TO to) (VP (VB orbit) (NP (DT the) (NN sun)))))) (. .)))
It takes about one year for earth to orbit the sun.