Assertion: boric acid | /r/AtLocation | use
Facets:
value: in the united states
type: LOCATION
value: as an insecticide
type: PURPOSE
value: since 1948
type: TEMPORAL
Source sentences:
text: Boric acid has been in use in the United States as an insecticide since 1948 when it was first used to control fleas, termites, fire ants, cockroaches, silverfish and other pests.