Assertion: boron | /r/ObjectUse | used as a food preservative
Facets:
value: between 1870
type: TEMPORAL
value: between 1920
type: TEMPORAL
value: during ii
type: TEMPORAL
value: during world wars i
type: TEMPORAL
value: in the 80s
type: TEMPORAL
Source sentences:
text: Boron was used as a food preservative between 1870 and 1920, and during World Wars I and II.
text: In the 80s and 90s Boron was used as a food preservative.
text: Boron is commonly used in capsules to treat vaginal yeast infections and was used as a food preservative between 1870 and 1920.
text: Boron was used as a food preservative between 1870 and 1920, and during World Wars I and II.
text: Boron was used as a food preservative between 1870 and 1920, and during World Wars I and II.