( ( The year ) ( ( is ( ( the time ) ( it ( takes ( the ( earth ( to ( orbit ( the sun ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN year)) (VP (VBZ is) (NP (NP (DT the) (NN time)) (SBAR (S (NP (PRP it)) (VP (VBZ takes) (NP (DT the) (NN earth) (S (VP (TO to) (VP (VB orbit) (NP (DT the) (NN sun))))))))))) (. .)))
The year is the time it takes the earth to orbit 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.