Assertion: concussion | /r/CreatedBy | sports injuries
Facets:
value: usually
type: TEMPORAL
value: by a bump
type: CAUSE
Source sentences:
text: Most concussions are caused by motor vehicle accidents and sports injuries .
text: A concussion is usually caused by a bump or blow to the head from a fall, a motor vehicle crash, or a sports injury.
text: Most concussions are caused by motor vehicle accidents and sports injuries.