7. The method of claim 6 , further comprising: removing a set of parameters from the available set of parameters when the associated subnode has used up its tokens.
7. The method of claim 6 , further comprising: removing a set of parameters from the available set of parameters when the associated subnode has used up its tokens. 8. The method of claim 7 , further comprising: removing a set of parameters from the available set of parameters when the anchor text of the associated subnode is equivalent to anchor text in the summary in terms of salient words each contains.