For example, in Figure 1, an EL system must return NIL for "C9 hasName(i, n) hasFirstWord(i, w), hasLastWord(i, w), isBlacklisted(w): the word sequence w is blacklisted, containsMoreSpecificMentions(i): the i-th gene mention collocates with more specific gene mentions in the current context.
entrezGene (Maglott, Ostell et al.