( Hydrogen ( ( is ( ( ( the ( ( most abundant ) constituent ) ) ( of ( ( ( ( ( ( ( the sun ) and ) ( similar stars ) ) , ) and ) indeed ) ( the ( ( most abundant ) element ) ) ) ) ) ( in ( the universe ) ) ) ) . ) )
(ROOT (S (NP (NNP Hydrogen)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ abundant)) (NN constituent)) (PP (IN of) (NP (NP (NP (DT the) (NN sun)) (CC and) (NP (JJ similar) (NNS stars))) (, ,) (CC and) (RB indeed) (NP (DT the) (ADJP (RBS most) (JJ abundant)) (NN element)))) (PP (IN in) (NP (DT the) (NN universe))))) (. .)))
Hydrogen is the most abundant     constituent of the sun and similar stars, and indeed the most     abundant element in the universe.
(ROOT (S (NP (NNP Hydrogen)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ abundant)) (NN element)) (PP (IN in) (NP (DT the) (NN universe))))) (. .)))