Enclosed is a form you can complete and return to us in the postage-paid envelope.
( Enclosed ( ( is ( ( a form ) ( you ( can ( ( ( ( complete and ) return ) ( to us ) ) ( in ( the ( postage-paid envelope ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Enclosed)) (VP (VBZ is) (NP (NP (DT a) (NN form)) (SBAR (S (NP (PRP you)) (VP (MD can) (VP (VB complete) (CC and) (VB return) (PP (TO to) (NP (PRP us))) (PP (IN in) (NP (DT the) (JJ postage-paid) (NN envelope))))))))) (. .)))
Within is a document that you can fill out and send back with the postage paid envelope.
( Within ( ( is ( a ( document ( that ( you ( can ( ( ( fill out ) and ) ( ( send back ) ( with ( ( the postage ) ( paid envelope ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (SINV (PP (IN Within)) (VP (VBZ is)) (NP (DT a) (NN document) (SBAR (IN that) (S (NP (PRP you)) (VP (MD can) (VP (VP (VB fill) (PRT (RP out))) (CC and) (VP (VB send) (PRT (RP back)) (PP (IN with) (NP (NP (DT the) (NN postage)) (VP (VBN paid) (NP (NN envelope))))))))))) (. .)))