For W9's exemplary precision in telling us what vocabulary entries and dictionary entries are is offset by its vagueness about which type of entry its PR-wallahs have counted for their blurb.
( For ( ( ( ( W9 's ) ( exemplary precision ) ) ( in ( ( telling us ) ( what ( ( ( ( vocabulary entries ) and ) ( dictionary entries ) ) are ) ) ) ) ) ( ( is ( offset ( by ( ( its vagueness ) ( ( about ( ( which type ) ( of entry ) ) ) ( ( its PR-wallahs ) ( have ( counted ( for ( their blurb ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (IN For) (NP (NP (NP (NNP W9) (POS 's)) (JJ exemplary) (NN precision)) (PP (IN in) (S (VP (VBG telling) (NP (PRP us)) (SBAR (WHNP (WP what)) (S (NP (NP (NN vocabulary) (NNS entries)) (CC and) (NP (NN dictionary) (NNS entries))) (VP (VBP are)))))))) (VP (VBZ is) (VP (VBN offset) (PP (IN by) (NP (NP (PRP$ its) (NNS vagueness)) (SBAR (WHPP (IN about) (WHNP (WHNP (WDT which) (NN type)) (PP (IN of) (NP (NN entry))))) (S (NP (PRP$ its) (NNS PR-wallahs)) (VP (VBP have) (VP (VBN counted) (PP (IN for) (NP (PRP$ their) (NN blurb))))))))))) (. .)))
W9 poorly explains vocabulary entries, but its PR blurbs are excellent.
( ( ( ( ( W9 ( poorly ( explains ( vocabulary entries ) ) ) ) , ) but ) ( ( its ( PR blurbs ) ) ( are excellent ) ) ) . )
(ROOT (S (S (NP (NNP W9)) (ADVP (RB poorly)) (VP (VBZ explains) (NP (NN vocabulary) (NNS entries)))) (, ,) (CC but) (S (NP (PRP$ its) (NNP PR) (NNS blurbs)) (VP (VBP are) (ADJP (JJ excellent)))) (. .)))