Assertion: black salsify | /r/HasProperty | a kitchen vegetable
Facets:
value: since the seventeenth century
type: TEMPORAL
Source sentences:
text: Even though black salsify was a kitchen vegetable since the seventeenth century, most Dutch cookbooks from the eighteenth and nineteenth century keep it simple: black salsify was served with a butter sauce, sometimes with addition of parsley, and that’s it.