( ( ( ( Our galaxy ) , ) ( the ( Milky Way ) ) ) ( ( ( is there ) ( ( ,100,000 ( light years ) ) ( in diameter ) ) ) . ) )
(ROOT (S (NP (NP (PRP$ Our) (NN galaxy)) (, ,) (NP (DT the) (NNP Milky) (NNP Way))) (VP (VBZ is) (ADVP (RB there)) (NP (NP (CD ,100,000) (JJ light) (NNS years)) (PP (IN in) (NP (NN diameter))))) (. .)))
Our galaxy, the Milky Way is there,100,000 light years in diameter.
(ROOT (FRAG (S (S (VP (TO To) (VP (VB express) (NP (NP (DT the) (NN distance)) (PP (IN between) (NP (NP (DT the) (JJ milky) (NN way) (NN galaxy)) (CC and) (NP (JJ other) (NNS galaxies)))))))) (, ,) (NP (NP (DT the) (ADJP (RBS most) (JJ appropriate)) (NN unit)) (PP (IN of) (NP (NN measurement)))) (VP (VBZ is) (NP (DT the) (NN light-year))))))