14. The media of claim 10 , wherein the second string of each related string pair is identified by analyzing the user click log data.
14. The media of claim 10 , wherein the second string of each related string pair is identified by analyzing the user click log data. 17. The media of claim 14 , wherein the second string of at least one related string pair is a snippet corresponding to a web page included in search results provided for either the user search query or an additional search query that was clicked on after the corresponding search results were provided.