Assertion: celeriac's stalk | /r/HasProperty | eaten as vegetable
Facets:
value: since medieval times
type: TEMPORAL
Source sentences:
text: Whereas celery has been cultivated for medicinal purposes for thousands of years, and the leaves and stalks eaten as a vegetable since medieval times, celeriac did not reach this country until the late 1720s and has never really entered the popular culinary imagination.