A response card is enclosed for your convenience.
( ( A ( response card ) ) ( ( is ( enclosed ( for ( your convenience ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN response) (NN card)) (VP (VBZ is) (VP (VBN enclosed) (PP (IN for) (NP (PRP$ your) (NN convenience))))) (. .)))
It is required that you RSVP with the enclosed response card.
( It ( ( is ( required ( that ( you ( RSVP ( with ( the ( enclosed ( response card ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (VP (VBN required) (SBAR (IN that) (S (NP (PRP you)) (VP (VBP RSVP) (PP (IN with) (NP (DT the) (VBN enclosed) (NN response) (NN card)))))))) (. .)))