( 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 (DT The) (NN element) (NN hydrogen)) (VP (VBZ is) (NP (NP (DT the) (RBS most) (JJ abundant)) (PP (IN in) (NP (DT the) (NN universe))))) (. .)))
The element hydrogen is the most abundant in the universe.