( ( ( ( ( Important terms ) include ) : ) ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( solar system ) , ) ( astronomical unit ) ) , ) ( light year ) ) , ) galaxy ) , ) planet ) , ) ( Milky Way ) ) , ) ( scientific notation ) ) , ) star ) ) . )
(ROOT (NP (NP (NP (JJ Important) (NNS terms)) (SBAR (S (VP (VBP include))))) (: :) (NP (NP (JJ solar) (NN system)) (, ,) (NP (JJ astronomical) (NN unit)) (, ,) (NP (JJ light) (NN year)) (, ,) (NP (NN galaxy)) (, ,) (NP (NN planet)) (, ,) (NP (NNP Milky) (NNP Way)) (, ,) (NP (JJ scientific) (NN notation)) (, ,) (NP (NN star))) (. .)))
Important terms include: solar system, astronomical unit, light year, galaxy, planet, Milky Way, scientific notation, star.
(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))))))