The method may optimally include filtering the update events in the time period by a novelty measure, wherein the filtering disregards {HEAD ~ events} that do not include {TAIL ~ significant novel information} 
The method may optimally include filtering the update events in the time period by a novelty measure , wherein the filtering disregards { HEAD ~ events } that do not include { TAIL ~ significant novel information }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL