Assertion: marijuana's level | /r/CapableOf | rise in the marijuana samples
Facets:
value: to about 12 percent
type: OTHER
Source sentences:
text: They found that the level of THC, or tetrahydrocannabinol — marijuana's main psychoactive ingredient — in the marijuana samples rose from about 4 percent in 1995 to about 12 percent in 2014.