17. The system of claim 15 , wherein the instructions, when executed, further cause the system to: process the plurality of news collections for events that the objects respectively described by the plurality of news collections are involved in, wherein to measure the relevance of each of the plurality of news collections with respect to the objects respectively described by the plurality of news collections includes determining whether the events associated with the objects are pertinent based on object-types of the objects.
17. The system of claim 15 , wherein the instructions, when executed, further cause the system to: process the plurality of news collections for events that the objects respectively described by the plurality of news collections are involved in, wherein to measure the relevance of each of the plurality of news collections with respect to the objects respectively described by the plurality of news collections includes determining whether the events associated with the objects are pertinent based on object-types of the objects. 18. The system of claim 17 , wherein the instructions, when executed, further cause the system to: determine the object-types for the objects; and determine a list of pertinent events for each of the object-types, wherein to determine whether the events associated with the objects are pertinent based on the object-types of the objects includes determining, for each of the events in the plurality of news collections, the object involved in that event, an object-type for the object, and whether that event is included the list of pertinent events for the object-type.