13. The one or more machine-readable storage media of claim 11 , wherein obtaining information about the topic further comprises: (i) assigning the topic to one or more categories; and (ii) determining whether the topic is ambiguous based on the one or more categories to which the topic is assigned.
14. The one or more machine-readable storage media of claim 13 , wherein the topic may be determined to be ambiguous if the topic is assigned to more than one category.