( ( ( ( A ( globular cluster ) ) ( of stars ) ) ( in ( the ( Andromeda galaxy ) ) ) ) . )
(ROOT (NP (NP (DT A) (NN globular) (NN cluster)) (PP (IN of) (NP (NNS stars))) (PP (IN in) (NP (DT the) (NNP Andromeda) (NN galaxy))) (. .)))
A globular cluster of stars in the Andromeda galaxy.
(ROOT (S (NP (DT A) (NN galaxy)) (VP (VBZ is) (VP (RBS best) (VBN described) (PP (IN as) (NP (NP (DT a) (NN cluster)) (PP (IN of) (NP (NP (NNS billions)) (PP (IN of) (NP (NNS stars))))))))) (. .)))