( Hydrogen ( ( is ( ( ( ( the lightest ) ( of ( the elements ) ) ) ( as ( well as ) ) ) ( the ( most abundant ) ) ) ) . ) )
(ROOT (S (NP (NNP Hydrogen)) (VP (VBZ is) (NP (NP (NP (DT the) (JJS lightest)) (PP (IN of) (NP (DT the) (NNS elements)))) (CONJP (RB as) (RB well) (IN as)) (NP (DT the) (RBS most) (JJ abundant)))) (. .)))
Hydrogen is the lightest of the elements as well as the most abundant.
(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.