Assertion: concussion | /r/HasProperty | complex
Facets:
Source sentences:
text: Concussions can be mild or complex, so it is important to safeguard yourself from the lasting effects of your injuries.
text: Concussion is a complex condition.
text: A concussion is a complex physiologic event that causes problems with brain functioning (energy use and communication between nerves), but does not cause swelling or bleeding that affects brain structure.