{HEAD ~ The scores} are then aggregated to rate {TAIL ~ the event type} in addition to scoring the individual event instances 
are aggregated to rate
{ HEAD ~ The scores } are then aggregated to rate { TAIL ~ the event type } in addition to scoring the individual event instances
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH