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))))))))))
People receive many more items in the post if they have a computer in the house.
( People ( ( ( ( receive ( many ( more items ) ) ) ( in ( the post ) ) ) ( if ( they ( have ( ( a computer ) ( in ( the house ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS People)) (VP (VBP receive) (NP (JJ many) (JJR more) (NNS items)) (PP (IN in) (NP (DT the) (NN post))) (SBAR (IN if) (S (NP (PRP they)) (VP (VBP have) (NP (NP (DT a) (NN computer)) (PP (IN in) (NP (DT the) (NN house)))))))) (. .)))