Assertion: repeated concussion | /r/Causes | damage
Facets:
value: to his frontal lobe
type: TRANSITIVE-OBJECT
Source sentences:
text: In fact, before he became Omalu's patient zero following his death, Mike Webster's doctors had known that his repeated concussions had caused damage to his frontal lobe, which led to cognitive impairment, difficulty concentrating and an attention deficit, essentially causing him to become punch-drunk (a condition most commonly found in former boxers).