( Mars ( ( ( takes ( 1.86 ( Earth years ) ) ) ( to ( ( complete ( its orbit ) ) ( around ( the Sun ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Mars)) (VP (VBZ takes) (NP (CD 1.86) (NNP Earth) (NNS years)) (S (VP (TO to) (VP (VB complete) (NP (PRP$ its) (NN orbit)) (PP (IN around) (NP (DT the) (NNP Sun))))))) (. .)))
Mars takes 1.86 Earth years to complete its orbit around the Sun.
(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.