Lexicographers constantly face problems of defining terms that, in some instances, might require a brief essay to explain and far more specialized knowledge than can reasonably be expected from the user.
( Lexicographers ( constantly ( ( ( face ( problems ( of ( ( ( defining ( terms ( that ( , ( ( in ( some instances ) ) ( , ( might ( ( require ( a ( brief essay ) ) ) ( to explain ) ) ) ) ) ) ) ) ) and ) ( ( far more ) ( specialized knowledge ) ) ) ) ) ) ( than ( ( can reasonably ) ( be ( expected ( from ( the user ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNS Lexicographers)) (ADVP (RB constantly)) (VP (VBP face) (NP (NP (NNS problems)) (PP (IN of) (NP (NP (VBG defining) (NNS terms) (SBAR (WHNP (WDT that)) (S (, ,) (PP (IN in) (NP (DT some) (NNS instances))) (, ,) (VP (MD might) (VP (VB require) (NP (DT a) (JJ brief) (NN essay)) (S (VP (TO to) (VP (VB explain))))))))) (CC and) (NP (ADJP (RB far) (JJR more)) (VBN specialized) (NN knowledge))))) (SBAR (IN than) (S (VP (MD can) (ADVP (RB reasonably)) (VP (VB be) (VP (VBN expected) (PP (IN from) (NP (DT the) (NN user))))))))) (. .)))
Lexicographers can always provide the word meaning in a single sentence.
( Lexicographers ( ( ( can always ) ( ( provide ( the ( word meaning ) ) ) ( in ( a ( single sentence ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Lexicographers)) (VP (MD can) (ADVP (RB always)) (VP (VB provide) (NP (DT the) (NN word) (NN meaning)) (PP (IN in) (NP (DT a) (JJ single) (NN sentence))))) (. .)))