Model yields an estimate of the percentage change in a household's demand for postage as a result of owning a computer
( Model ( ( yields ( ( an estimate ) ( of ( ( the ( percentage change ) ) ( in ( ( ( a ( household 's ) ) demand ) ( for postage ) ) ) ) ) ) ) ( as ( ( a result ) ( of ( owning ( a computer ) ) ) ) ) ) )
(ROOT (S (NP (NNP Model)) (VP (VBZ yields) (NP (NP (DT an) (NN estimate)) (PP (IN of) (NP (NP (DT the) (NN percentage) (NN change)) (PP (IN in) (NP (NP (NP (DT a) (NN household) (POS 's)) (NN demand)) (PP (IN for) (NP (NN postage)))))))) (PP (IN as) (NP (NP (DT a) (NN result)) (PP (IN of) (S (VP (VBG owning) (NP (DT a) (NN computer))))))))))
There is a change in the use of postage depending on whether a household owns a computer.
( There ( ( ( is ( ( a change ) ( in ( ( the use ) ( of postage ) ) ) ) ) ( depending ( on ( whether ( ( a household ) ( owns ( a computer ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ is) (NP (NP (DT a) (NN change)) (PP (IN in) (NP (NP (DT the) (NN use)) (PP (IN of) (NP (NN postage)))))) (PP (VBG depending) (PP (IN on) (SBAR (IN whether) (S (NP (DT a) (NN household)) (VP (VBZ owns) (NP (DT a) (NN computer)))))))) (. .)))