15. Computer software, according to claim 13 , wherein the pre-determined filtering rules are based on at least one filtering criteria selected from the group consisting of: time, location, keyword match, semantic similarity, and relations to known events.
15. Computer software, according to claim 13 , wherein the pre-determined filtering rules are based on at least one filtering criteria selected from the group consisting of: time, location, keyword match, semantic similarity, and relations to known events. 16. Computer software, according to claim 15 , wherein the pre-determined filtering rules are based on at least two of the filtering criteria that are logically combined.