Assertion: nerve agent | /r/AtLocation | the u.s. arsenal
Facets:
value: for years
type: TEMPORAL
Source sentences:
text: Although the nerve gas, called GB by the military, had been in the U.S. arsenal for years and the U.S. had not yet ratified the Geneva Protocol banning its use, the policy of the Nixon Administration was "no first use" of lethal nerve gas in combat.