The context we consider contains the four preceding and the four following words.
we did not take into account the position of the words in the context, but only their presence in the right o r left context, and in addition we replaced, whenever possible, each w ord by a feature indicating (a) whether the word was part of the gene lexicon, (b) if not whether it was part of the protein lexicon, (c) if not whether it was part of the species lexicon, (d) and if not, whenever the candidate was neither a noun, an adjective nor a v erb, we replaced it by its part-of-speech.