<http://schema.org/keywords>
"sports concussions concussions sports concussions protocol horse jockeying horse jockeys horse jockey concussions horse racing concussions horse racing jockeys guild kentucky sports"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/tech-media/2016/06/17/horse-jockeys-concussion-management>