Assertion: saccharin's safety | /r/HasProperty | studied since its discovery
Facets:
value: extensively
type: DEGREE
value: with research
type: OTHER
Source sentences:
text: The safety of aspartame has been studied extensively since its discovery with research that includes animal studies, clinical and epidemiological research, and postmarketing surveillance, with aspartame being one of the most rigorously tested food ingredients to date.