Assertion: sunflower | /r/ObjectUse | used for more than 5,000 years
Facets:
value: by the native americans
type: OTHER
Source sentences:
text: They have been used for more than 5,000 years by the Native Americans, who not only used the seeds as a food and an oil source, but also used the flowers, roots and stems for varied purposes including as a dye pigment.