6. The method of claim 1 , comprising extracting a second escalation feature from a user session and running the second escalation feature through the classifier to generate at least one of a second escalation likelihood result or a second RUI likelihood result.
6. The method of claim 1 , comprising extracting a second escalation feature from a user session and running the second escalation feature through the classifier to generate at least one of a second escalation likelihood result or a second RUI likelihood result. 7. The method of claim 6 , extracting a second escalation feature from a user session comprising extracting one or more of: a number of queries; a query structural feature; an escalating result feature; a number of non-query webpages; or a user session time feature.