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"concussion movie nfl concussion movie release date concussions nfl concussions football brain disease football cte football bennet omalu concussion movie concussions brain disease bennet omalu cte"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/nfl/2015/12/23/bennet-omalu-cte-professional-football-players>