9. The method of claim 8 , wherein selecting a replacement token comprises selecting, as the replacement token, a related token from the set of related tokens based on a distance vector between the particular token and the related token.
9. The method of claim 8 , wherein selecting a replacement token comprises selecting, as the replacement token, a related token from the set of related tokens based on a distance vector between the particular token and the related token. 10. The method of claim 9 , wherein selecting a replacement token comprises selecting, as the replacement token, a related token from the set of related tokens based on a distance vector between the particular token and the related token and a subject weight of the related token.