These two accounts are commonly combined in discussing the Social Security program.
( ( These ( two accounts ) ) ( ( ( are commonly ) ( combined ( in ( discussing ( the ( Social ( Security program ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (CD two) (NNS accounts)) (VP (VBP are) (ADVP (RB commonly)) (VP (VBN combined) (PP (IN in) (S (VP (VBG discussing) (NP (DT the) (NNP Social) (NNP Security) (NN program))))))) (. .)))
The Social Security program involves the combination of these two accounts.
( ( The ( Social ( Security program ) ) ) ( ( involves ( ( the combination ) ( of ( these ( two accounts ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Social) (NNP Security) (NN program)) (VP (VBZ involves) (NP (NP (DT the) (NN combination)) (PP (IN of) (NP (DT these) (CD two) (NNS accounts))))) (. .)))