( ( ( ( ( ( The Sun ) -LRB- ) and ) ( our ( solar system ) ) ) -RRB- ) ( ( ( ( ( is ( revolving ( around ( ( the center ) ( of ( the galaxy ) ) ) ) ) ) , ) and ) ( makes ( ( a ( complete revolution ) ) ( every ( ( ( ( 220 million ) years ) or ) so ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNP Sun)) (-LRB- -LRB-) (CC and) (NP (PRP$ our) (JJ solar) (NN system)) (-RRB- -RRB-)) (VP (VP (VBZ is) (VP (VBN revolving) (PP (IN around) (NP (NP (DT the) (NN center)) (PP (IN of) (NP (DT the) (NN galaxy))))))) (, ,) (CC and) (VP (VBZ makes) (NP (NP (DT a) (JJ complete) (NN revolution)) (ADJP (DT every) (ADJP (QP (CD 220) (CD million)) (NNS years)) (CC or) (ADJP (RB so)))))) (. .)))
The Sun (and our solar system) is revolving around the center of the galaxy, and makes a complete revolution every 220 million years or so.
(ROOT (S (NP (NNP Earth)) (VP (VBZ makes) (NP (DT a) (JJ complete) (NN revolution)) (NP (ADVP (IN around) (NP (DT the) (NN sun)) (PP (IN about) (ADVP (RB once)))) (DT every) (NN year))) (. .)))