( ( ( ( ( This polytrope ) , ) ( while ( not ( suited ( for ( modelling stars ) ) ) ) ) ) , ) ( ( has ( been ( used ( to ( ( describe ( ( stellar distributions ) ( in ( globular ( clusters ( and ( galaxy distributions ) ) ) ) ) ) ) ( in ( galaxy clusters ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN polytrope)) (, ,) (SBAR (IN while) (S (RB not) (VP (VBN suited) (PP (IN for) (NP (VBG modelling) (NNS stars)))))) (, ,)) (VP (VBZ has) (VP (VBN been) (VP (VBN used) (S (VP (TO to) (VP (VB describe) (NP (NP (JJ stellar) (NNS distributions)) (PP (IN in) (NP (NN globular) (NNS clusters) (CC and) (NN galaxy) (NNS distributions)))) (PP (IN in) (NP (NN galaxy) (NNS clusters))))))))) (. .)))
This polytrope, while not suited for modelling stars, has been used to describe stellar distributions in globular clusters and galaxy distributions in galaxy clusters.
(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))))))))) (. .)))