... characteristics of the lexical ontology MeSH, the use of a corpus to examine the problem space, the method of determining the rela-tions, the accuracy of the results, and the problem of am-biguity. The ... current levels of the CP were considered to be the correct levels of descrip-tion. If, on the other hand, several different paraphraseswere found, then the analysis descended one level of the hierarchy. ... examined, by hand, 20% of the NCsthey cover, paraphrasing the relation between the nouns, and seeing if that paraphrase was the same for all the NCsin the group. If it was the same, then the current...