Assertion: narcotic's use | /r/HasProperty | remained stable
Facets:
value: fairly
type: DEGREE
value: among 12th graders
type: OTHER
value: since 2012
type: TEMPORAL
Source sentences:
text: Usage among 8th, 10th, and 12th graders has been decreasing since 2011, while use of botanical marijuana has remained stable.
text: Although past-year nonmedical use of CNS depressants has remained fairly stable among 12th graders since 2012, use of prescription opioids has declined sharply.