( Oxygen ( ( is ( ( the ( ( most abundant ) element ) ) ( on earth ) ) ) . ) )
(ROOT (S (NP (NNP Oxygen)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ abundant)) (NN element)) (PP (IN on) (NP (NN earth))))) (. .)))
Oxygen is the most abundant element on earth.
(ROOT (S (NP (NNP Oxygen)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (DT the) (JJ second) (ADJP (RBS most) (JJ electronegative)) (NN element))))) (. .)))