Assertion: concussion | /r/HasProperty | categorized on a scale of severity
Facets:
value: not that long ago
type: TEMPORAL
value: upon a time
type: TEMPORAL
Source sentences:
text: Once upon a time, and not that long ago, concussions were categorized on a scale of severity: grade 1 (mild), grade 2 (moderate), or grade 3 (severe).