3. The system of claim 1 , wherein the first plurality of listings includes a listing that includes a title, wherein the search engine is further configured to sort the second plurality of filters based on a probability of the first attribute-value pair randomly occurring in the title.
3. The system of claim 1 , wherein the first plurality of listings includes a listing that includes a title, wherein the search engine is further configured to sort the second plurality of filters based on a probability of the first attribute-value pair randomly occurring in the title. 4. The system of claim 3 , wherein the search engine is further configured to sort the second plurality of filters based on a probability of the first attribute-value pair occurring in the listing with the second attribute-value pair.