17. A system for providing a structured topic drift for a displayed set of user comments on an article, the system comprising: one or more electronic devices; a communication interface in electronic communication with the one or more electronic devices; a memory that stores instructions; and a processor responsive to the instructions to determine an ordered sequence of topical recommendations based on one or more properties of the displayed set of user comments and user characteristics using a sequential recommendation model; sample one or more user comments for each of the topical recommendations to produce a set of one or more user comments for each of the topical recommendations; append the one or more user comments for each of the topical recommendations to the displayed set of user comments; and update the sequential recommendation model based on a user response to the one or more user comments for each of the topical recommendations.
19. The system as claimed in claim 17 , wherein the processor is further responsive to the instructions to determine a second ordered sequence of topical recommendations using the sequential recommendation model; sample each of the topical recommendations in the second ordered sequence to produce a second set of one or more user comments for each of the topical recommendations; and append the second set of one or more user comments for each of the topical recommendations to the displayed set of user comments.