9. The method of claim 8 , extracting a second escalation feature from a user session history comprising extracting one or more of: features of a number of content queries per a time vector; features of a prior session query; or features of prior session resources.
8. The method of claim 1 , comprising extracting a second escalation feature from a user session history 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.