Assertion: sarin's use | /r/HasProperty | approved
Facets:
value: recently
type: TEMPORAL
Source sentences:
text: PB had been used since 1955 for patients suffering from myasthenia gravis with doses up to 1,500 mg a day, far in excess of the 90 mg given to soldiers, and was considered safe by the FDA at either level for indefinite use and its use to pre-treat nerve agent exposure had recently been approved.