8. The system of claim 7 , wherein the corpus information includes a catalogue of products for sale on the network-based marketplace and wherein the first member includes a first product for sale on the network-based marketplace.
7. The system of claim 6 , wherein listing information is for a listing that describes an item for sale on a network-based marketplace, and wherein the input information includes a title of the listing that describes the item for sale on the network-based marketplace.