Assertion: concussion | /r/AtLocation | the u.s.
Facets:
value: annually
type: TEMPORAL
value: through sports and recreational activities
type: MANNER
Source sentences:
text: The CDC estimates as many as 3.8 million concussions occur in the U.S. annually through sports and recreational activities, however only a fraction are recognized by athletes, coaches, parents, and are treated by medical professionals.