( ( Bootes II ) ( ( may ( be ( either ( ( ( ( a ( satellite galaxy ) ) ( of SagDEG ) ) or ) ( ( one ( of ( its ( star clusters ) ) ) ) ( torn ( from ( ( ( ( the ( main galaxy ) ) 4 ) -- ) ( ( ( 7 billion ) years ) ago ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Bootes) (NNP II)) (VP (MD may) (VP (VB be) (NP (CC either) (NP (NP (DT a) (NN satellite) (NN galaxy)) (PP (IN of) (NP (NNP SagDEG)))) (CC or) (NP (NP (CD one)) (PP (IN of) (NP (PRP$ its) (NN star) (NNS clusters))) (VP (VBN torn) (PP (IN from) (NP (NP (NP (DT the) (JJ main) (NN galaxy)) (NP (CD 4))) (: --) (ADVP (NP (QP (CD 7) (CD billion)) (NNS years)) (RB ago))))))))) (. .)))
Bootes II may be either a satellite galaxy of SagDEG or one of its star clusters torn from the main galaxy 4–7 billion years ago.
(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))))))))) (. .)))