Assertion: charcoal's amount | /r/CapableOf | decrease in 2000 years
Facets:
value: suddenly
type: MANNER
value: between 1353
type: TEMPORAL
value: between 1349
type: TEMPORAL
Source sentences:
text: In a recent example, scientists examining Alpine ice cores discovered that the amount of lead pollution in the atmosphere decreased suddenly only once in 2000 years: between 1349 and 1353, when the Black Death engulfed Europe.