24. The system of claim 23 , wherein combining the category relevance for the particular selected search result with the information retrieval score of the particular selected search result comprises: multiplying the category relevance for the particular selected search result by the information retrieval score of the particular selected first search result, or adding the category relevance for the selected search result by the information retrieval score of the particular selected search result.
23. The system of claim 19 , wherein adjusting the respective score for a particular selected search result comprises combining the category relevance for the selected search result with an information retrieval score of the particular selected search result.