Assertion: calendula's flower | /r/HasAspect | long history of use
Facets:
value: as the source of natural compounds
type: PURPOSE
Source sentences:
text: Calendula flowers have a long history of use as the source of natural compounds that help heal injured skin.
text: This edible flower blooms monthly by the calendar (hence the name) and has a long history of use in Greek, Roman, Catholic, and Hindu traditions.