Enclosed is a specially prepared and entertaining crossword puzzle that challenges your knowledge about the law school.
( Enclosed ( ( is ( ( a ( ( specially ( ( prepared and ) entertaining ) ) ( crossword puzzle ) ) ) ( that ( ( challenges ( your knowledge ) ) ( about ( the ( law school ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Enclosed)) (VP (VBZ is) (NP (NP (DT a) (ADJP (RB specially) (JJ prepared) (CC and) (JJ entertaining)) (JJ crossword) (NN puzzle)) (SBAR (WHNP (WDT that)) (S (VP (VBZ challenges) (NP (PRP$ your) (NN knowledge)) (PP (IN about) (NP (DT the) (NN law) (NN school)))))))) (. .)))
There is no crossword puzzled enclosed in this mailer.  
( There ( ( is ( ( no ( crossword puzzled ) ) ( enclosed ( in ( this mailer ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ is) (NP (NP (DT no) (JJ crossword) (NN puzzled)) (VP (VBN enclosed) (PP (IN in) (NP (DT this) (NN mailer)))))) (. .)))