creating {HEAD ~ a rating} for the media based on {TAIL ~ an aggregate} of the plurality of scores for the plurality of events 
based on
creating { HEAD ~ a rating } for the media based on { TAIL ~ an aggregate } of the plurality of scores for the plurality of events
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH