Assertion: sodium thiopental's use | /r/CapableOf | become common
Facets:
value: since sodium thiopental
type: TEMPORAL
value: increasingly
type: DEGREE
Source sentences:
text: The use of pentobarbital in lethal executions has become increasingly common since sodium thiopental , the drug historically used as an anesthetic, became unavailable in 2011 after the manufacturer stopped supplying it for executions.