( Oxygen ( ( is ( second ( only ( to ( fluorine ( in ( the ( electronegativity scale ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Oxygen)) (VP (VBZ is) (ADJP (JJ second) (PP (RB only) (TO to) (NP (NP (NN fluorine)) (PP (IN in) (NP (DT the) (JJ electronegativity) (NN scale))))))) (. .)))
Oxygen is second only to fluorine in the electronegativity scale.
(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))))) (. .)))