Assertion: aspartame's safety | /r/CapableOf | come into question
Facets:
value: over the years
type: TEMPORAL
Source sentences:
text: The safety of another sugar substitute came into question after a study suggested an increase in brain tumors in the U.S. might be related to the use of aspartame.
text: Over the years, the safety of many food additives , from food dyes to trans fats , has come into question.