( Electronegativity ( ( ( decreases down ) ( ( a column ) ( of ( the ( periodic table ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Electronegativity)) (VP (VBZ decreases) (PRT (RP down)) (NP (NP (DT a) (NN column)) (PP (IN of) (NP (DT the) (JJ periodic) (NN table))))) (. .)))
Electronegativity decreases down a column of the periodic         table.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (PRP we)) (VP (VBP move) (PRT (RP down)) (NP (NP (DT a) (NN group)) (PP (IN of) (NP (NNS elements)))) (PP (IN on) (NP (NP (DT the) (JJ periodic) (NN table)) (, ,) (NP (PRP$ their) (NN electronegativity))))))) (NP (PRP it)) (VP (VBZ decreases)) (. .)))