( Hydrogen ( ( ( is also ) ( ( the ( ( ( simplest and ) ( most abundant ) ) element ) ) ( in existence ) ) ) . ) )
(ROOT (S (NP (NNP Hydrogen)) (VP (VBZ is) (ADVP (RB also)) (NP (NP (DT the) (ADJP (ADJP (JJ simplest)) (CC and) (ADJP (RBS most) (JJ abundant))) (NN element)) (PP (IN in) (NP (NN existence))))) (. .)))
Hydrogen is also the simplest and most abundant element in existence.
(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))))) (. .)))