Let us consider the dust-jacket blurbs of Cobuild, CED , and two other native-speaker  the British Longman Dictionary of the English Language (Longman , 1984) and the American Webster's Ninth New Collegiate Dictionary ( W9 , 1983).
( ( Let ( us ( consider ( ( ( ( the ( dust-jacket blurbs ) ) ( of ( Cobuild ( , ( CED , ) ) ) ) ) and ) ( ( two ( other native-speaker ) ) ( ( the ( British ( Longman Dictionary ) ) ) ( of ( ( ( ( the ( English Language ) ) ( -LRB- ( ( ( Longman , ) 1984 ) -RRB- ) ) ) and ) ( ( ( the ( American ( Webster 's ) ) ) ( Ninth ( New ( Collegiate Dictionary ) ) ) ) ( -LRB- ( ( ( W9 , ) 1983 ) -RRB- ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Let) (S (NP (PRP us)) (VP (VB consider) (NP (NP (NP (DT the) (JJ dust-jacket) (NNS blurbs)) (PP (IN of) (NP (NNP Cobuild) (, ,) (NNP CED) (, ,)))) (CC and) (NP (NP (CD two) (JJ other) (NN native-speaker)) (NP (NP (DT the) (NNP British) (NNP Longman) (NNP Dictionary)) (PP (IN of) (NP (NP (NP (DT the) (NNP English) (NNP Language)) (PRN (-LRB- -LRB-) (NP (NNP Longman)) (, ,) (NP (CD 1984)) (-RRB- -RRB-))) (CC and) (NP (NP (NP (DT the) (NNP American) (NNP Webster) (POS 's)) (NNP Ninth) (NNP New) (NNP Collegiate) (NNP Dictionary)) (PRN (-LRB- -LRB-) (NP (NNP W9)) (, ,) (NP (CD 1983)) (-RRB- -RRB-))))))))))) (. .)))
The are mistakes on the cover of three or four prominent dictionaries.
( The ( ( are ( mistakes ( on ( ( the cover ) ( of ( three ( or ( four ( prominent dictionaries ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP The)) (VP (VBP are) (NP (NP (NNS mistakes)) (PP (IN on) (NP (NP (DT the) (NN cover)) (PP (IN of) (NP (CD three) (CC or) (CD four) (JJ prominent) (NNS dictionaries))))))) (. .)))